Ridgetop
Herd Master
If the pens are put tgether with wire over the top how about covering them with tarps for the summer? If the carpenter recommended to you by your friend does a good job reasonably on the trusses, maybe he can copy the missing pieces for you. If the copany doesn't make that model anymore, check on line for "Directions to Assemble" that model. Often companies leave the assembly/operating directions on their websites even when the product is discontinued.If I do that, then there will be 2 roof pieces for each one, and I can add some metal roofing over top of a section of the wire top cover panels...... 3 ft of metal roofing does not cover much, up high like that... but it would solve needing to make any roofing pieces for it...