If your the kind of person that likes to build their own attachments then we have you covered here at Ai2 Products. These are the same bushings we have custom made for our own attachments. Designed for the DIY kind of person!!!
If you need the complete attachment bushing set check out the link.
If you need the 1.875” attachment pin to go with the bushings check out this link.
If you need the complete set of attachment pins check out this link.