Hi sir?i'm interested with your project,i can help you for make disc from your skecth,i using solidwork for do it and i can send format file stl so you can for 3d printing,i thinks this simple job,so i bidding with price $25 this make sense,1 part $3.3 so 6 part $20 and for $5 for tax,you can send dimension and i can make this to 3d modelling,i very happy can help you,i wait your replay,thanks Dedy.e