I started with a V80 rebuild, it is not easy getting that board desoldered but I feel like its still worth it. I've done a bunch of them now - probably worth the same desoldered as it is new with matias just because of the work and risk to do it and not destroy the pads. My go-to laptop board for work was a V80 with cream dampened skcm in it. (I'm willing to sell it... or sell you a desoldered v80.. or a v80 with matias QC if thats something you're interested in).
To my knowledge, the only other TKL PCB out there thats worth anything is the Leeku ALPhaS board which can be used in a bunch of the expensive aluminum TKL boards out there. I have one in my LZ CLS and its superb (albeit a bit of work to solder in all the diodes and stuff).
There are a bunch of inexpensive kits that "that_canadian" and "bakingpy" have made for things that are split ortholinear. I'm pretty sure all of their designs are MX and ALPS compatible. MiniDox, Iris, Nyquist, ECO, Lets Split w/ onboard controller... just to rattle off a few from the top of my head.
http://keeb.io and
http://www.maple-computing.com