I need a 3d printing expert for product design

I am looking to for an expert to design a product for me so that I can print it on a 3D printer. The product is very simple since it is a rubber bushing as the "Prototype Image" attached shows. The dimensions of this product are as follows:
Outer Diameter of long cylinder: 43mm
Length of long cylinder: 12.5mm
Inner Diameter of long cylinder: 25mm
Outer Diameter of cylindrical cap: 47mm
Inner Diameter of cylindrical cap: 25mm
Length/height of cylindrical cap: 3mm

I am including a rough (not to scale) drawing of the component called Prototype Dimensions.

This product would be used as a bushing between a bottle and a steel fitting.