Did you try googling it? If you find some through google then come back here and do a search of the companies to find some information. No one comes to mind unfortunately otherwise I'd give you some links.
Not sure if you're still looking for an exchange reseller program but I would highly recommend Intermedia's program. been selling this service for a while and it's been great. pricing structure is solid and the exchange add-ons they offer add a TON of value to our exchange offering. let me know who you decide to go with!