Virginia,
We use an ADCO PN 12252 cover for our 2720 SL. Like you, we deal with leaves on the TM roof and the resulting colored stains. Yesterday was a good day to wash and cover our unit until all the leaves are down. I took a few photos and posted them here:
http://picasaweb.google.com/commodor47/ADCOCover#
I did read your OP but never had time to respond. We were in an accident on September 27 and totaled our TV. Jeri and I are okay. I have a large contusion on my left forearm due to the air bag deployment. We have spent the last two weeks dealing with insurance and searching for a replacement TV. After searching a few online listings, we settled on an Explorer Sport Trac. Hope to have the new TV by the end of week.
Could you post a few photos of your covered 2720 SL?
Dick