I was going to buy a reproduction group 27 battery for my completed restoration. Figured that would be easy. Of course, like everything else, they're not currently available. So I thought I'd give this battery topper a shot so at least I'd have something that looks like the original red cap battery. Now I can't find a maintenance free group 27 battery anywhere in order to use this battery topper. All I'm finding is batteries with caps, which won't work with the topper because it needs a flat surface.

Has anyone else had this issue? Any suggestions on where I can find something that will work?