To be honest, I would change the order to a Talos-II lite. I don't think they will have the Blackbird back in stock quickly.
Price-wise, it hardly makes a difference. But you need a bigger case, of course, unfortunately.
I just double-checked the T2 lite specs and in addition to the case size, which is a bit annoying but probably workable with a case like you suggested, there were a couple of other Blackbird-specific features I wanted (mostly to reuse hardware I already have):
- On-board audio output
- SATA Ports
So assuming I also wanted to add a GPU, getting equivalent features would probably require 3 slots, but the T2 lite only has 2, so that is a bit of a problem.
If you can't reach anyone via support, I would try Twitter. If you don't have a Twitter account, you can give me your ticket number and I'll write to Raptor.
I don't have a Twitter account, but if you could have them look at ticket #337978 it would be much appreciated.