I just noticed you posted earlier with some links from Canada computer. I think it will be hard to find a combo case and PSU that is high quality for $100.00 Cdn. A good quality PSU will cost that alone.
How big of a PSU do you need?, If you just look at the PSU section of Canada Computer they have some Antec Truepower and Neo He for under $100. Stay away from the Smartpower series.
Someone posted a link recently that had a list of quality PSUs somewhere here in the forums. I'll look and see if I can find it so at least you have a reference point to shop around with.