I know you want to do it on the cheap, but there is guy on ebay selling the OEM knockoff appliques. They look exactly like they came from GM but at a fraction of the cost. I bought the silver ones for my LS and bought black to replace the stock ones that had gotten scratched. Perfect match.

Although to me, those things only look good on a black car. The silver ones on my LS looked ricey. They look ricey on the red, blue and white cars too IMO.

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04 Indy SS build #972
XP, TOG's, Lightning injectors, 2.8 pulley, 105 CC springs, Wizaired, 3.29 gears, tripleedgeperformance ported blower, machined LIM, 180* tstat, RS12YC@.053, FP rewire, Alt rewire, stage 1 V boost, PRJ wires, Stage 2 IC