356122 Amazon API / REST / asp.net VB

Hi I have an existing page built in VB for asp.net that used the Amazon API to get a list of products and display them in a datagrid. It connects to the Amazon API using a REST query and then binds the XML results to the datagrid. The page doesn't use code behind and the subroutines are all in a script tag at the top of the page. The page no longer works since Amazon changed its API to require "signed requests". I need someone who is familiar with the new Amazon requirements to modify the page to sign the request and get it working again. I would like the existing page modified to work rather than a brand new page from scratch.