Hi
Orange OBC 115 - sounds great but is big and heavy
Barefaced -loads of options, the Two 10 is very powerful , I think 600 watts and fairly light but top quality
Mark bass 2x12 Ninja - no experience myself but light and powerful
Would there be a market for such ? It would likely be quite expensive and between the bass terror and the LBT these cover a lot of ground. The LBT also seems to be a very good recording amp.
I'm a recent owner of a BF Two10, about a month, very happy with the sound but completely different tone and much more powerful and beefy to the much cheaper cab I had before. Sounds great with my Orange Little Bass Thing and G&L L1000.
I have a L1000 it's great but to my ears sounds nothing like a P bass, if that's what your after I believe the only way to itch that scratch is to get one - that said you can easily pick up a decent second hand MIM fender.