External print server?

I’m looking for a solution that would allow me as a service provider to host the drivers of my customers printers, i.e I would like to install their printer in their network and point to the driver over the internet to my print server.

There’s a solution called Cirrato that will let you do that. But, it will not let me host the drivers of several different customers, just one per server.

Does anyone know of any other solutions for this?