Need help with a router problem

I recently bought an 595u air card from verizon wireless because dsl is not offered and the phone lines are to crappy for broadband and it works great but my problem is that I want to share my Internet connection on both of my home computers. One is up stairs and the other is in the basement. Is there a way to do this wireless? Ethernet cables is not an option.The 595u air card has a usb plug on it.The people in the geek squad at best buy told me I would need an adapter that one end is usb and the other end with an Ethernet connector on it. Then I would be able to plug my 595u air card into the adapter and then to a router and install wireless cards on both the desktop computers.Do any of you know of an adapter made for this or a router that has a usb connector on the incoming Internet side,or is there any other way?
Your help would be great on this matter.