ive had a few different clutch setups, and have installed and driven both the stage 3 and 3+ Specs on a VRT. the first Spec3 broke pretty bad. the buttons were destroyed, it ate the flywheel pretty bad, and the spring baskets split. all under 20kmi. the 3+ is still in the car, has about 10k on it and so far he hasnt had a problem with it.
now you mention contaimination. unless its organic fluids dont really absorb into the disk. AKAIK the spec3 is a cera-metallic material. so if it got fluid on it, it would burn off rather quickly (amd’s S4 clutch had that occur) slipped for a few miles after the clean up, but it holds great now.
On Topic, i personally like Clutchnet clutches. im not sure if they have something OTS for you, but its worth calling or emailing Igor at Clutchnet any way, they could piece together a custom application