AFAIK, the anti-theft system on local Troopers is not factory installed. The systems are installed (usually by Banawe installers too) while the vehicle is at the dealer awaiting delivery.

Look under the dash to see what brand it is. Irregardless of brand, any good installer can yank it out. Try Winterpine in Araneta Ave since they install stuff for most Quezon Avenue auto dealerships.