I thought I'd mention an alternative to Warmoth, USA Custom Guitars.
Tommy and several of his crew used to work at Warmoth and in my opinion (having bought body & neck blanks from both), I think they are very close but it was Tommy's customer service that pushed USACG over Warmoth, IMO. Good enough customer service for me to drop his name whenever I can.
Between Brian at Universal Jems and Tommy at USACG, I've found the only sources I need for guitar parts/accessories. I don't think either one carries finishing supplies but between the two you'll be able to get everything else you need to build with.
LoL
I sound like a commercial!
I've played neck-heavy guitars as well and have found that my fretting hand spends as much energy or more holding the guitar up than it does playing which is annoying and tiresome. Along with actual neck to body weight, balance can be made, like www mentioned, in the placement of the strap pins.