420C Sprockets Needed

[ejb17]

I know this sounds funny but I am looking for sprockets to fit my 420C but worn out is OK. They are for a project I am working on for the crawler. Also I would like to keep the cost down. As long as the basic round part is Ok they will be good by me. I also hate to tear up a good set as they are hard to come by. I would prefer the ones for the 12" shoes and the wider settings part # T16261T (M3098T) Thanks for the help. If this project goes well I will post pics and reasons why( I must be insane).