Here are few i hope this helps
you need to contact George Rankin as he make all of these parts:
http://www.acmoc.org/bb/showthread.php?17522-George-Rankin-working-in-his-shop
http://www.acmoc.org/bb/showthread.php?16584-George-Rankin-rolling-roof-tin
George Rankin 530-437-2247
Grimes Ca. 95950