I had a local glass company install a complete shower enclosure in out coach. Took out the brass stuff and put in the brushed nickel. They came to the coach, measured, the wife picked out the trim she wanted as there are several available and they went away. Came back in a couple of weeks and installed the new stuff. By having a glass place do it, you can make slight changes in the size of the enclosure. For instance, ours is a little higher than came in the coach. You can also specify how many and where the towel bars are placed.
I replaced all the brass fixtures with nickel hardware bought at a plumbing supply house
2002 Country Coach Intrigue