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If you want to fix them up check the proto 1000 shell to see if the pilot is separate on it and could be mounted in the AHM. Then I would check E bay again for shells for the AHM. Beyond that you are probably on your own and should probably consider making a mold of the one and casting the others in epoxy.
I don’t mean to sound rude, but why would you want to mess with a AHM FB when P1Ks is competely scale, runs 50 times better, has body mounted couplers, handrails, and scale flanges on the wheels? Also you get them on eBay for $25.00 to $35 dollars. Just wondering? No flames please.