I've been doing research off and on regarding Western Electric 300B amplifiers. A real favorite is the 91A 300B amplifier.
I found Min's Tube Audio Lab searching for modern WE91A builds. It seems Min can build them for many price ranges and as customized as you can afford but they start at $1750 per pair. They feature point to point wiring just like they used to build them. You won't find pcb's in these amps. Check out his portfolio as it is impressive http://www.tubeaudiolab.com/id22.html Here are a couple examples of his work. He does more than WE91A builds so if you need custom work check out his site and see if he is the guy to build your next amp. I wonder how much he would charge to build a Brook clone for me.