Ray, a couple years back our Interstate all battery store had some optima blue and yellow top. Last time or two I have been up there I did not notice them though.If you have one of those close to you give them a callI was very close on room when I moved my trolling motor batteries up front in my boat, I thought I may have o go that route but didn't. I gained a 1/2" by swapping out the 3/4" plywood and replacing it with 1/4" aluminum plate. That squeezed me by.

