>>96454382
There's a lot to unpack in your post, anon. Simple quick answer: can you get someone to 3D print the part you need?

I've cast metal models using a hot pot to melt casting metal (a mixture of tin, bismuth, and sometimes lead) and a two-part silicone mould, but this is a pretty big production if you want to do it correctly.

Lately, there's been more talk of using resin or green stuff/milliput with "temporary" moulds made from Oyumaru or something similar. That, I have never had much luck with - but others have, and I bet you could find some tutorials on YT.

>>96454906
Dwayne "The Rock" Johnson, Sofia Vergara, Billy Joe Armstrong of Green Day, and Jaret Reddick of Bowling for Soup all turn(ed) 53 this year.