You could probably knock out the quads on a long weekend. It would be cheaper. I think your light output will be similar if you ran Mini H1 in the quad vs FX-R in the TYC's. You will be better off retro'ing the quad opposed to dropping an HID kit into the TYC.
Ebay should be able to help find a temp headlight if you need. Or you can grab some OEM or TYC projectors for a couple hundred more. Whatever you do, you will likely need a relay harness as well. JJ at retroshop.us can hook you up. Also if you add TYC projectors to a quad based truck you will have an additional adapter to buy ($135?)
Using your quads, you might spend $250 for parts and paint? Getting TYC...300-450 for the projectors, $300 for the HID kit/FX-R and harness, plus $135 for the adapter.
Rough estimates of course. Opening those TYC projectors aint easy.