493509 Gift Certificate Script

I need a GC Script usable on any website... including Wordpress... I need to use either paypal or amazon payments. I need a graphical (I'll create graphic(s)) GC that can be printed after being paid for... but each one needs a unique identifier (receipt code number, etc) that is superimposed onto the graphic before printing. The gift certificates will be used offline and will need to be printable. The unique code (receipt number, whatever) needs to be kept in an area that shows it was used or somehow emailed to the store owner so that he can have some sort of record when a GC is used. This should not be that complicated. I have an example of a website that offers GC's in a way that I'd like to be able to have... [login to view URL] Go thru the process of buying one of these (without actually buying, duh) and see the options they offer. I'd like to see those available. Please bid and tell me time frame.. also, if you've done this type of script before then tell me if you have any other ideas that would be helpful..