That's actually a really good idea. I mean there's a few different online luthier suppliers around Aus, but really if you want exactly what you're looking for unfortunately most of the time you have to bend over and let Stew Mac give it to you, and that hurts!!
e.g $10 (aus) for a tiny bottle of super glue then another $30 just to get it here, etc etc:-(
I know you'd be entering into a whole new realm stocking specialist tools, but the way the site, the community, and by default the business are growing I don't think you'd have a problem shifting stock.
Even if you started with basic fret leveling kits, say a notched straight edge, leveling beam, fret rocker, crowning file that sort of thing, then progress to your fretting tools, router bits, inlays and binding and the list goes on...
Shit, I know if I had the choice when shopping for luthiery tools who I'd rather give my money to.
Why not make PBG the one stop shop for everything guitars.