my usual hunting grounds these days is Aliexpress for fetishy but non latex items. i now have the super shiny and tight leggins bellow and well most of the other ones now. the robot ones are my pj bottoms and might end up wearing all day if not going out.
link to item: at aliexpress.com here.
really tight putting on for the first time but then much easier. i just ordered a second pair.
also there seems to be a sale that starts tomorrow on loads of items. i spotted a catsuit in pvc for under 10$ so had to get one.