Some thoughts about these.
1. Ball chutes : would be able to 3D print them (choice of colors), replaced a couple of mine that way [pm if interested/pricing]
2. Plastics : n/a
3. Wire loom guide : unfamiliar with part, does this hold the shooter coil assembly in place or where exactly would it go on the back? (probably wouldn't be able to part with it, but could dimension for it to be made out of metal)
4. I was looking at this comparable in case mine died www.ebay.com/itm/330672305103
Hope this helps,