Depends how old the unit is, if it more than 2 years old, the manufacture probably will not have what was used anymore. Most of the colors/designs used are changed every year or even more often.
I would suggest you go to a local upholstery or sewing shop, or someone that does that kind of thing at home is really best. Have them look at what you have and get estimates to recover them in the colors you choose. The valances are easy to remove, so is everything else. Then anything else you "need" to replace, you can match it to the colors you want. That way it will "look" like from the factory, with "your" style.
That is what we did in an older 5th wheel we bought, years ago. I have a cousin that buys older RV's and completely removes everything, then replaces carpet, tile, curtains/blinds and valances, counters or whatever it needs to spruced it up, like "new", then he sells them. He worked over 30 years in the RV business, and has a very good business now that he is "retired", doing that.
Anyway, hope this helps and God bless.
Mike, Judy and Jubilee (she lets us live in "her" 5th wheel)
2009 Cedar Creek 36RD5S - 2007 Dodge 6.7L Dually
WA8MRU - 1963