Student work visa help

Hey,
So the student work visa's for uk nationals have closed.

Basically my problem is I have a job offer in Canada commencing this December. Is it possible in any way to get a visa allowing me to work in canada for a few months at this time?
Do any third party companies have access to extra visa's or is it possible to contact any bureau's on the off chance that one may become available?

Also if it is not possible to get one for 2011, the 2012 visa application opens on november the 1st. will it be possible for these to start before the 1st jan 2012?

Many thanks for your help guys, would really appreciate any help as im desperate.