Perhaps I am slow but I could use some help.

My current battery lasted 8 years (Kragen exide $30) and has now failed.

I thought it would be a simple matter to replace. It hasn't been.

The usual suspects Kragen, Sears, Costco, autozone do not carry a replacement battery in their computer system. Couple of online sites list replacement at $120-140 dollars + shipping (one was $349!!!). Searched Brickboard, my Haynes manual and Owners manual for battery spec. No Joy. I feel I have done my homework.

One Interstate battery source said use Group 46 another Group 47. Would have to special order. Current battery does not have Group # anywhere on the case.

Costco had a battery with same dimensions but hold down lip was at base on sides rather than at base on ends.

I would like to spend $40-80 for the battery.

Anyone have an inexpensive source for replacement battery that is close to correct size and has hold down edges on ends of battery?

Anyone have suggestions on replacement tray/hold down combo that would hold newer batteries? Should I use heavy rubber bungee as one poster did?

I do know that I need to be aware of where the + and - posts are so that existing cables will reach. + post needs to be rearward and outboard when battery is in position.

Thanks for any advice
Howard