Windows – Get dial up internet on Windows 7 computer without PCI cards

64-bitdial-upnetworkingwindows 7

I have just purchased the Dell Zino HD for my grandparents, which is fantastic for their needs. The only problem is that is does not come with a built in 56K dial up modem.

Does anyone know of a good external dial up modem that supports 64bit Windows 7? It does not matter if it connects by USB or ethernet or whatever, it just needs to be simple and easy to use (excluding once off setup).