Hello Ray, I have to keep searching for your Tractor Model, as they are not all the same system of Battery layout/restraint. I presume the image below is like your machine?.
Easy enough to fabricate to actual spec if you note the spacing and diameter of the holes in the Tray. if the rods and hole dia is a 1/4", I can produce a set if you're desperate.
I would just need to know what your Battery type/height is , if you have now sorted which one you need.