There's a website that's central to this, unfretted.com. Here's their manufacturers' links:
http://www.unfretted.com/loader.php?LINK=sitelinks#Shops
I had Warmoth make me a fretless "7/8" Warhead neck for a solid Walnut off-label body. Bloodwood neck, ebony board. It's a fierce slide guitar (what I built it for) and the board has enough sustain to do the Landreth slide/fretted combination type licks, but there are some problems with fingered-fretless guitar as a worldbeater. I've played fretless bass for 20 years, and to get two parallel notes really in tune with each other, you want to put two fingertips right beside each other - a "barre" placement isn't reliable. So wider is better.
I guess the two best fretless guitarists these days are Guthrie Govan and Ned Evett?
https://www.youtube.com/watch?v=OvTAEVr1Vs4
They both seem interested in playing a fretless so it sounds most like a fretted one as possible. Surely, something better can be thought of - just like everything else, I'm pretty sure you should play slow to get fast. And the faster you abandon the 12-tempered-tuning straightjacket, the more fun it should be.... :evil4:
Supposedly, any well-equipped autoglass shop has the tools to bend and shape and smooth glass into any shape you'd need. They don't order up prefit windows from warehouses. As soon as they finish laughing at you (maybe wave some $20 bills around) it ought to be fairly easy to figure out. I do know from this puppy, once you subtract the fret thickness from the neck, this 1" "fatback" feels none too large to me. So if you plopped a 0.250" piece of glass on a Wizard, it'd work OK. It would surely be easier on the glass shop (and you) to NOT get a compound-radius fingerboard. Actually, if I were to pursue this I might start with a cheap Ibanez, get the glass cut, then make a new neck to that exact glass piece... surely a worthy cause for a patient, young and wealthy person! Maybe somebody on that unfretted site has achieved something lately.