Devoloping OSCOMMERCE MODUL

Hello, We are using oscommerce, as an ecommerce shop and are using a matrix printer to print our invoices (we are using a different kind of paper, dont know the name of it, but there are total 4 folds) What you need is to programme a new [login to view URL] to our own invoice paper. More detailed project description: We need a programmer, which can develope a modul, to oscommerce so we can print our invoices directly on the invoice paper, which have some specific colons where, we/you need to enter your prices etc (all things which are required on an invoice) We will send an image with the exactly size of our invoice. So you can see where you need to add the text,price etc.