You don't tell us what kind of MH you have. At any rate there are a number places to find seat covers varying from Camping World & Amazon for generic "one size fits all" to custom made sheep skin from Blondies Pit Stop (
https://blondiespitstop.com/) and many others from RV supply businesses such as PPL Motorhomes (
https://www.pplmotorhomes.com/). Many of the RV places also have a selection of window privacy curtains. Your selection is going to pretty much driven by your budget - sheepskin seat covers will run around $300 each whereas cloth covers can be had for well under $100 a pair.
Happy hunting,