authorize dot net ARB

I need a modification to the osCommerce [login to view URL] contribution to allow Automated Recurring Billing transactions to be passed through to Authorize.net. The site is Virtual Art Academy. Requirements for vendor: Responses are accepted ONLY from programmers who have already implemented ARB with [login to view URL] in osCommerce. Please provide the URL of the site that you have already done this work for. NO OTHER VENDORS will be accepted.