Since you mentioned CB, why don't you try them first? http://www.cbperformance.com/
There are basically two styles of gaskets for your 2110.
The first style is the one almost nobody has and is the "C-channel" gasket. This is the gasket that fits the CB Performance custom valve covers that chances-are you don't have. The only reason I mention it is just so you know that it exists, just in case . . .
Everyone else uses the standard valve cover gasket that looks something like rubberized cork (Don't get the ones that are solid rubber). The "cork" gaskets fit all clip-on valve covers (painted steel, stainless steel and finned aluminum). The gaskets also fit the bolt-on version of the finned aluminum covers. Its a 99.99% chance you want the "cork" gasket. They've got 'um at CB, search for: valve cover gasket.
PS: Change the gasket every time you pull the valve covers for routine valve adjustment. In other words, buy the bag of 10 gaskets.