Can't you get one from them?
This is from their site....
Requires DSL modem available from Qwest for $59.99 purchase or $5/mo. rental. Rented modems will be refurbished modems. Non-supplied Qwest modems may not be supported. Shipping and handling fee of $9.99 will be charged to your account. Modem rental charges continue until modem is returned. Actual DSL speed varies depending on service location, phone line qualifications, computer