ibash Anyone find something nice that they like?
Just buy felt by the yard at a craft store. You'll need also good scissors if you don't have them already. Plenty of choice with color and thickness and quality. Cheap price especially if you wait for when the material is on sale, should you need to penny-pinch.
MacMacMac BTW ... I don't understand this felt key cover. This piano already has a proper key cover.
The purpose of these covers is for uprights which have the music stand on the key lid: if not properly closed, the music stand could scratch the keys. You can (rightly) argue that somebody who is sloppy and does not close the music stand, would be equally sloppy and not use the felt key cover. The manufacturers would argue that the hinges could come lose and in that case the key cover will be useful.
Exhibit B: I've never seen these covers on grands.