Seeking a UK craftsman or customiser for chastity devices

I reside in Sheffield, UK. We have been searching for someone who can either craft a new ball-trap device for us or customise one we purchase specifically for this purpose. A craftsman, blacksmith, jeweller, or anyone with experience creating such items would be ideal. Qualifications like being kink/chastity friendly and not easily embarrassed are also desirable, along with someone easy to collaborate with. The material must be 316L Stainless Steel. Additionally, while it is not a deal breaker if they live within an hour or two’s ride (my joints start hurting after prolonged cycling), it would be excellent if we could work closely with them to achieve the best possible device. Just for clarity: We are definitely looking for paid services, not freebies.