if youare going to do a lot of these it might be worth yourwhile to use one of the chased waxes to make a new mould out of a good silicone rubber. you could then cast waxes in a few mins.
Mny ofthe guys on the forum have been casting metal for many years, one or two that i know have worked in a foundry. alot are operating small part time businesses doing casting , mainly automotive stuff. im pretty sure that if anyone volunteers to do the work they will be up to the task. As I dont think they would risk the embarrassment of cocking it up if they werent up to the job
you could always post a picture there of you wax pattern and see what response you get even if its just for some advice, they love looking at pics