by lamps I think you mean bulbs holders here?, just me getting it straight as I call the who plastic unit a tail lamp or light?
Anyhow, if you mean bulb holders, then I have had experience with a 93,98 and 99 car which all had DIFFERENT bulb harnesses. Have you been able to removed the light unit, allow you to unscrew the bulbs?
I have a selection of random bulb holders, they are no longer in a full loom but could be soldered in. The problem sometimes is that these do not match your years light unit and so the bulb holders wont go in.
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'99 Z28 A4, 253 LS2 heads, 228R TSP cam, Patriol Dual Springs, Double roller timing chain, LS6 ported oil pump, OBX LTs, 3" True Duals, LS6 intake, 42lb/hr injectors, SLP lid + bellow, EFIlive COS 3 Speed Denisty Tune (self tuned), 3200 Circle D stall, CAI mod, KYB AGXs, Eibach Pro Front Springs, UMI panhard, LCA + Brackets, Strut Brace, Custom Subframe connectors, WS6 axle with 3.42s, 18" American Racing Rebels, US mirrors, 93 tail lights, 3.5 inch custom cowl hood. Mickey T's Street DRs on Vette-ZR1 wheels for the strip !
Best ET: 12.0 @ 116 mph (on a 0-60ft of 1.8 s)