[thumper]

I'm not sure how effective this page is but it's worth a try if there are no other options:

STOLEN CARS OF BC ALERT
https://www.facebook.com/groups/1946505402241618/

[pb.kidz]

Revscene members found my friends car before the cops could lol

[valent|n0]

some good suggestion here too

https://www.reddit.com/r/LifeProTips/comments/3rs9mo/lpt_good_way_to_recover_a_stolen_vehicle