Kentmere used to make Kentint papers on various colour bases, and a range of metallic bases as well. I used quite a lot and bought large rolls of the Silver and Gold based paper in the 80's. John Blishen in London used to distributed similar papers made in Germany, along with PhotoLinen.
Kentmere also made Opaline on a translucent plastic base for back lit displays. In fact one major reason Ilford bought Kentmere was their Inkjet Opaline was/is a market leading product with quite high sales.
Welcome to Photrio BTW.
Ian