Hi-res scanning of slides: lab?

I'm trying to find a lab to do hi-res slide scans at a reasonable price. My scanner only does scans to 30MB and I need 54MB minimum, with specific requirements for publishing. Up here in the Great White North, where it's currently 28C., the prices I have found are absurd: $25 for 1 scan. I could understand this years ago, but not now with the huge improvements in scanning devices. Anyone know of a good facility that can be trusted with originals and gives great results? ( At least until I get a new system?)