'89 Long Bed Dimensions and Canopies

[76C10Stepside]

I've been looking for a used canopy for my '89 S-10 long bed (89 inch long). Found some free/cheap aluminum and fiberglass canopies for the 6-foot short bed, but no luck so far finding a canopy for the longer 7-foot, 5-inch bed.

The long bed is 89 inches (7', 5") lenght I.D., 91" O.D.
Bed inside width at wheel housing is 40.3 inches, 60" O.D.
(O.D. measurements are approximate with bed liner in place).

Are the 2nd gen S-10 fleetside bed dimensions the same as 1st gen?

Are there any other trucks (e.g., Dodge Dakota) that have the same dimensions (or close enough) to the 1st gen S-10 fleetside long bed?

If I can't find one that fits, I'll have to modify a short one or make one from scratch. No easy way to modify either type (alum or glass) that looks good.
Anything I build is going to cost a LOT in raw materials look pretty funky.
Any and all suggestions welcome!