What I need is the big aluminum bracket that clamps to the backbone. It holds the actual guides
Shot in the dark here, doesn't sound like it, but are both missing? That shouldn't be overwhelming; either one literally pattern for the other, IIRC. They are opposite "hand", mostly where guides mount, maybe an extra boss for the coolant line.
Manufacturing Logic tells me Mr. Kalamazoo would not bother with 2 different castings that could/ should be identical, until a bit of fixturing makes them separate
part numbers.
BTW, certain of something else; those are aluminum to minimize countering weight difference if they were cast iron - affecting the feed rate control.
- Study part list to visualize making it, sketching along the way.
- Determine how to collect measurements from sample.
- Only two are important, over all length, and offset of clamp to center line of blade. - If you have a height gauge and surface plate (or table of milling machine) and couple short machinists jacks, not too challenging.
- You'll need a blade of course, in a pinch make sample of strapping tape.
- Make it oversize a known amount, install and check. - The guide adjustment will do the rest.
- These assume you've developed required skills and tools, perfectly OK if not. Here's opportunity to do so!
- I don't care how good 'Joe' thinks he is, making thought out steps remains important. Get your head around them.
This forum contains plenty of expertise, willing mentors, I guarantee each was apprehensive about some former project themselves.