I know from experience that sometimes it's more important to put the damn thing together. Parts will come, no worries! I like this bike because it's such an underdog, even though it's a Yeti. I remember that back then people complained that the Troy Lee graphics are not right for a Yeti and that Schwinn ruined the company and I also assume that this bike is actually rarer than the 6 inch version. My guess is that if you wanted a gravity Yeti back then, you'd go for the top shelf bike with all the options. But its what makes it so cool.
If I was you, I'd look for a first generation Boxxer, a matching XTR rear deraileur, a Big Un front hub, a matching rear wheel with a HED rim, a Yeti/Bontrager saddle, Yeti grips, a King or Ringle Slamma Jamma headset, Michelin tires and identical brakes. Just my two cents.
Still, it's my favourite bike from around here since a while now...
1990 GT Karakoram 20" Purple Haze (urban project); 1993 GT Karakoram 20" Ferrari Red (classy beater); 1993 GT Karakoram 14.5" Black Light (almost original); 1994 Breezer Jet Stream 18" (unlikely story); 1995 Winora full suspension (a fine riding mistery); 1997 Kona A'Ha (anniversary edition); 1997 GT Arrowhead 18" (poisoned gift); 1998 Stevens 6.1.2 (true warrior); 1998 GT Moto cruiser (just google it!); 1999 Santa Cruz Chameleon (the heartbreaker revived); 1999 GT Lobo 1000 (retired with works Super T); 2000 GT Lobo (turns original); 2001 Klein Attitude Comp 19" (ultralight project); 2001 Cannondale Jekyll 1000 SL (better that a lot of "fresh" bikes); 2003 Intense Tazer (close to factory team spec); 2003 Intense M1 (old dream on hold); 2007 Crupi Pro XXL (pumptrack teacher)