I’m looking to get a 3d print done and have it molded/cast for 40 copies. There are some services I’ve found that offer this that I’m waiting on quotes from but figured I’d check locally here as well. 
What material are you wanting the cast in?
Honestly, whatever works best for the sculpt. I’ve attached an image of it. Right now I have the base separate. There might need to be more separations for casting, I’m not sure