ADJ and Elation have some ties to each other, so the chances are either company would probably know what a case would fit within their umbrella.
Personally, the phone is my friend. I often work where I need fast and definitive answers. No doubt you are familiar with this sort of environment since you're posting here in the first place. People want something at the last minute but they've known about this for a while sort of things. Or, in my recent case, something just got sprung on me and well, the holidays and this "down day" crap really hoses up on shipping schedules!
Short of phone calls, your best bet is to have your dimensions and call case companies. Even if that meant ADJ. I'll waste time on the phone researching, because it saves time in the long run. Web forums tend to take a low priority in general and your results are hit and miss at best. Thank goodness ADJ and Elation are stepping up on forum efforts, but I'm sure it's as time permits.
I find the one thing that gets me priority treatment is the phone, short of showing up in person. A face to face isn't practical these days.
Since my gear fits 19" rack cases, my problems are easily satisified.
This is how I approach things: Time=money.
If I waste time, I waste money.
If I need answers, I usually need answers fast.
No answers mean wrong purchase. Wrong purchases means wasted money and/or destroyed or damaged gear, which means more money wasted on repairs.
If I can't get case questions answered, I have 4-5 other case companies I can call and get answers, estimates and timelines.
Right now, I'm researching an Allen & Heath iLive T112 with an IDR48 processing rack. My issue in this scenario is a 3-piece case for the control surface so I can take it apart and put it back together on my own. But, thanks to a few screw-jobs, I have to wait 18 months to a year to get this gear now, but by then, the way things are progressing, there will be a ready-made case for this console available.
Another thing to keep in mind with gear:
Lots of things use the same dimensions as other things. Why? In part, it's because it's a good and convenient design. So, you'll see many lights using the same basic shape and taking up the same basic amount of space in the same way, because it's somewhat "uniform". Sure, you don't need to re-invent the wheel, but sometimes you can put some fancy rims on it, yet it's still a round rim and would fit the same box.
Then again, sometimes you need custom cases. Often though, you don't really need a true custom case, you just need to ensure you've ordered the right case.
Another situation of mine is that I'm looking to get some new racks and I require front and back rack rails and 4-inch casters(it's my requirement and it's not uncommon). If anything, I can use the rear rails to attach blank panels to help with cable control and rigidity. But a 19" rack case is fairly standard and customizing these isn't any big deal.
Just do this, before you purchase, get on the phone and get a guarantee from who-ever you talk to that the case you are ordering will in fact fit the light you want it to protect. I'd go as far as to get it in writing, via having it specified on the proposal/quote/estimate and the invoice. This way, if it doesn't fit, it's easier to have a recourse of action without having to get super nasty about it.