On our past camper we replace the bed and cushions covers. We ended up having RVworkshop make us new covers, we also had them send us some additional fabric for some end covers and valances.
http://www.rvworkshop.com/cushion-covers
We ended up making new curtains and re-used the plastic tabs.
vinyl flaps for around the beds. We tried to clean ours and found that we were taking off the top layer of color and that the base is a different color. I would think you could buy the flaps from TM through a dealer.