I did use the SS rubrail and I think it looks great. I ordered mine from Jim Jackson at Viper Customs. Here is what he quoted me in 2009 when I did it, I think it probably cost me another $100 for the freight:
The rub rail and insert for your Saltare’, black factory replacement is $275. This comes in coils so shipping is reasonable.
The black rub rail with ¾ stainless insert is $ 395 and will ship truck in 20’ lengths. There is also about $20 worth of screws needed to apply the SS. Best estimate is that it is about $160 more expensive to replace with SS rail.
Former owner of a 1987 Supra Saltare. Current owner of a Malibu 23LSV.