Propco has some props at reasonable prices – it’s a bit confusing but look at the 1st and the 4th groups that come up on the list the link below gets you to:
Before you order you may want to give them a phone call to be sure you pick from the right group.
Dave
I might be wrong but I’m sure the original prop for your motor was of the weedless design with the long flowing blades. Although some people don’t like them, I find they push a light boat around quite well.