custom wear

My partner/keyholder wants to wear a key necklace to constantly remind me of my position. I suggested that I loved the idea but it'd hold even more appeal if the key was functional. She said she wanted something pretty to wear, so I am asking if there is someplace online I can buy custom or...

I've seen latex armbands before. http://affordablelatex.com/armband is an example. But I'm wondering if anyone knows where I could buy a custom one, maybe with a design like this: http://www.femdomartists.com/art-new/enforced%2Dmale%2Dchastity%2Dcaption.jpg ? It's something I'd love to wear to...