Virtuemart shipping developer

A little bit more about the project: My client [login to view URL] is a company that sells big and small appliances online. He has recently changed coeriers as the new company can provide better rates with regard to the delivery of the items. The new coerier company doesnt have a straight forward API that can be used thus the problem. Their pricing structure is on their servers and we need a way that virtuemart can communicate with their servers and give a quote to our clients. ([login to view URL]!/Audit/Audit_Post) The process must be as follows: 1- Client select product and add to cart 2- Client enters shipping address 3- Address together with product dimensions are sent to coerier company's server and the server responds with a qoute that is added to the cart 4- Product price plus quote is added and a final price is displayed to the client.