I concur with ScottL
, and believe the Kaces Porter KKP7KB is probably the best fitting case w/ wheels (snug but not too snug) for the PSR2000/2100.
From the looks of the picture, it appears like it's the older style KKP7KB, which includes a retractable handle vs the newer fixed swivel handle included on currently produced ones. I think the older pull out retractable handle design provides more comfort & transporting ease than the newer swivel handle, so consider yourself lucky if you're able to snag this one on Ebay. - Scott