add pdf download this page to document_general products?

i would like to add a button to download this page information as a pdf to the users computer, there are way too many to add as an attribute or sample file (im using document_general for case studies and/or treatment information)

im happy to write it myself as best i can but im not really sure where to start or if there is a module like this already. if anyone could provide any assistance i would appreciate it. thanks

Add html to you product description for this href

sorry maybe i didnt explain properly, i know how to link to a pdf file, but what i would actually like to is generate an on the spot pdf file to generate a pdf of that particular page, i have many many products and i dont really want what will eventually be 4 or 5 hundred pdf files for each product, needing to be updated every time my product descriptions are, i have php enabled within my ezpages, i would rather use a script to generate a pdf version on the fly if and when needed?