Please identify this thumb mounts.

Many years ago I bought a 200lc to clean drainage ditches with for the local drainage district. With the long stick I also received the regular stick that came with the machine but the company that traded in the machine kept the removable parts of the thumb. So fast forward to now and I want to remove the long reach and put the regular stick on to remove fence and trees in the fence but need to replace the thumb.

Can anyone identify the manufacturer by the remaining parts on the stick?...

Please identify this thumb mounts.

Please identify this thumb mounts.