Jason-CL
Caselabs Rep
it's why i'm on the forum asking around, the only other option i can think of is the CaseLabs Bullet BH4 and there on amazon for £189.99
You can also check Bestcases.eu, they sell the BH4. It's not a 90 degree motherboard, so it doesn't really meet that requirement, but if you're willing to forego the 90 degree mounting it's a great little case (no bias, I promise, lol).
There's been a patent by Silverstone on the 90 Degree rotation, and I've heard rumor that it may have expired or is expiring in certain countries. That's really the reason you didn't/don't see many cases with that orientation from anyone else.