Respectfully, a Quantum Bigfoot failing is not a sad thing, IMHO. These things were cheap, slow, unreliable bottom of the barrel boat anchors even even when new and they have not improved with age .
Except for nostalgia reasons (which I respect), I don't see why anyone would to use a Bigfoot.
As for building a PC that contains one, I would be inclined to accompany it with a PC Chips 486 board with fake cache, a Realtek ISA VGA card (or maybe an Oak OTI37, whichever is slower), a Zoltriz AV206 or AV307 sound card, a Deer or Diablotek PSU (with an ATX to AT adapter), a 3Com 3C501 NIC and the rattiest partly yellowed/browned case possible (past use as a rodent latrine would be a bonus). A good name would be "Turdputer" .
A nice CRT with unfixable misconvergence, geometry issues, blooming, softness, crappy dot pitch and a buzzing PSU that gives off an ozone like smell would help too.
Full disclosure: I may be joking a bit .