Bib number ordering

I am looking for a function that will be added to my current web site which will allow users to enter a running bib number onto a web page, this would then take them to a page showing photographs of them taken during that event. From this page they would be able to order a copy of the photograph, which needs to be linked to a paypal cart. I hope this make sense, for an example of what I am looking for please see [login to view URL]