Just to follow up, in case I can get a bit of help with part numbers, since I'm not getting good results with Google - I have attached some photos of parts I need for this mower frame.

1. The front wheel tyre is marked: Victa SUPERTRAK 150
The plastic rim on the inner side of the wheel is broken (photo below). Any hints on tracking one down would be a big help.

2. One the the original plastic handle knobs is missing. Sure, I have a hardware store knob as a replacement, but it would be nice to get an OEM part. Again, any clues?

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