I'd like to build my own keyboard (not from scratch you understand) but want something I can say.. yes I assembled/built that.
Are there any kits/vendors that you can advise on.
Any suggestions?
Easiest PCBs to get right now are the Phantom (from MK.com), Ergodox (from Massdrop), and Sprit (from the GB sub-forum) ones. You might also be able to get a GH60 when that comes out. Korean boards such as the KMAC and LZ boards are also options.
You can also buy a stock board and modify it with switch swaps, spring swapping, or LED changes. For example making lubed ergo-clears or Jailhouse Blues.
I recommend you take a drive through Making Stuff Together to see what's out there in terms of custom stuff.