If you can find a set of old aluminum tips, grab them. I found a pair, stripped them and gave them a nice paint job. They looked great and will not crack or break. The screw holes even lined up. Looks like there is at least one set on eBay.

Pete

Pete Burns
Happy owner of a 1974 Citabria 7ECA
Sad ex owner of a 1946 Aeronca Champ 7AC
Sad ex owner of a 1967 150G
North Creek, NY 0NY0 (Bennett's Field)