[Zope] Zope ISPs

Hi; I have a client that wants to do business with an ISP other than myself. He's looking for a well-established firm. One that has a secretary answer the phone would be a good start. I think we're using Zope-2.6.1 and I know my programmer had an issue with a newer version not being compatible with our shopping cart, so installation of a different Zope version than what you're currently using may be a necessity. The client mentioned needing lots of storage space for a CRM app and databases, as well as many email addresses, none of which I consider currently to be a difficulty. Will have more info later. Your help appreciated. beno