You use to be able to pay $35 to Transport and they'd put your DHC-6 PPC on your license, so it looked like a type rating. Mainly for foreign recognition of the PPC, however as of 2015 this is no longer possible.
I wouldn't pay for a DHC-6 rating, get a job with a twotter operator.
A DHC-6 rating is cheap, for an operator. If they want you to have a type rating before hiring you, I guarantee you will not have the best experience with that company.
Spend the extra cash on getting some PIC time, or something that will help you land that job.
My $.02.
Enjoy!