I think I am capable of helping you here. Well, I don't know if something as meager as sharing a link can be considered help though. Here, this is what I can share here http://paxamedical.com/ . Vist the website and you will find pretty much everythign you might want here.
I want to find one and I am counting on your help in this endeavor. If at some point you came across such a marketplace or even had personal exerience with it- please share it here.
