Wondering if anyone has an original canopy that can be measured and some detailed photos so I can rebuild mine. Also a ruff list of materials to make it as factory correct as possible. I see a picture in the parts book that gives a ruff idea. Seems to me the top was slatted boards when I looked at one as a youngster. Also, Top material was?  

probably packing cases. you could use a nice hard wood timber like oak or cedar. i would use spotted gum, yellow stringy bark or ironbark prehaps.

Thanks for that info. Nice thing here is we have a saw mill on the farm so I can cut out whatever materials would be needed. With all these machines still around I would think someone would have one with an original canopy that could be measured and some photos showing original construction. If someone within a days drive has one that I could get some photos of and measurements that would be OK also. I would post the info here so anyone in the future that wanted to could reproduce one to factory specs.

I sent an email to the Caterpillar visitor center and museum to see if any blue prints may still exist and a bill of materials. If I get anything I'll be sure to post it here. I did include the 8B5903 Canopy Group number and the Top number 8B5805.

here is the canopy i made by scaling the parts book for my 7U---the posts appear to be original that came with the dozer

you could possibly steam form a bit of ply or a few veneer boards to make that thickness.