Find a dealer for Westward Products near you, I believe they handle Summers compatible teeth.
https://www.westwardparts.com/web/westward/search-results

Shoup has a few versions depending on which you need. I don’t think they have the bent ones

Looks like you might be able to order directly from Gaber, they have them
https://www.gaberdistributors.com/summers-herman/z1e1q?limit=25