Bucyrus Erie 22b boom inserts

Does anybody know where I can get some boom inserts for a 1956 Bucyrus Erie 22b with the bolt together angle boom fairly cheap? I was given this machine as a restoration project so it's not like it's going to be making money for me, but I've got a few projects around home that I could use a little more boom to reach.


Thanks.

Bucyrus Erie 22b boom inserts