Blackie, I don't know where you're located but I used a small battery business in Wichita. They were able to use my dimensions and hold-down reqmts. and came up with a maintenance-free battery made in Korea that fit perfectly. I paid about $120. for it which was about the going price at the time. It's about 4 years old now and still going strong. Maybe there's a similar business close to you?
Bruce