I bought inserts from Ocsidance for my 808 knobs. I was really happy to find these here and they are very useful and work perfectly to fill in all the little spaces on the 808 knobs. As far as I know, these inserts are unique to Ocsidance. I am located in the US and received these promptly from Ocsidance (which is obviously located in the Netherlands). Furthermore, they discounted the shipping after the sale! Very satisfied with Ocsidance on every level!