I believe the front belts from a 95-96 FW will work. The 94 FW belts are a different animal with two retractors. ....
Fred - '95-6 has the same 2-belt 'dual retractor' setup as '94. If I take your meaning it sounds like possibly just taking the FW shoulder belt (rearmost retractor assy) and using it to replace the similar B- single belt. The upper b pillar anchor swivel mount is at least configured similarly on both cars. Maybe you can in fact get a black FW complete set and cut the front belt off the male insert (reference OP pic above) and hook it up and retain a single belt design.
It seemed the head scratching decades back was on putting a D-body 2-belt setup in a B-body.
\'96SS SOB: SSRI, Herter Tune, Tri-Y II, , 3000 Edge, F/HO bars, METCO extendeds with CV MMC, Bilsteins, currently Vredestein Ultrac Sessanta (315/35 rear). Finally, wait for it... LT-4 knock module!
\'96FWB BUW-Butt Ugly White: PCMPerformance tune, HDFA w/ swissed filter, 1/2 SLP s.s. catback with H- and Flow Super 50s, oem opti rebuilt 3 times, SS Bars, METCO LCA, Airlift 1000, Monroe SS, PowerTrax No-Slip, CTS wheels with +1 rubber. Finally, yes again... LT-4 knock module!