For the sake of test driving,....you can just stop at a Volvo dealership. That's what I did when I was in the market for an HDT. They may question you about a CDL? But it'd be worth a try. I told the salesman why I was needing an HDT. He then, went and talked to his manager, and off we went.
2001 Kenworth T-600, 18 Spd Eaton Fuller, 500 HP C15 Cat
2012 41' Keystone Fuzion 399 Toyhauler