Looking for a Jewlery designer to make stl file that are cast ready . Anyone

I’m an amateur jeweler making castings from lost wax 3d resin prints . I’m looking to link up with a designer that can make designs that are functional cast ready not just look good on screen . I’ve been making some pieces that look good on screen but once cast in metal the prongs are to thin etc . I want someone with experience in designing for actual gold castings to provide me the stl file for me to print and then cast into gold / silver

The project I’m doing now is a peacock ring I found online but it’s not good for cast due to thinness of prongs etc but I do like the visual of it and I would prefer a more substantial ring that’s heavier . Think this one was like 4 grams 14k yellow gold

1.5 mm stones for the bulk and 2 mm for the center wing feather . I want to work with a pro that can take this design inspiration and make it better read less