I am sure you can contact them via phone from Canada. Well, here are the details:
Baig Limo Services: +92 300 8450 222 ; +92 308 5555 557
You can get Hummer and Lincoln Limos from them.
Tulip Riverside Hotel: +92 300 5413 786 ; +92 544 652 555(6)
You can get HUmmer, Lincoln, Crysler with Rolls Royce's face and Cadillac Limos from them.