I've been using these guys for a long time and can't recommend them enough.
Their work is impeccable, I have yet to find a scan gone wrong, you can look
through proofs quickly, and they're using actual pro grade scanners and are
checked by humans. The only caveat is that you need to check off a minimum of
50% to keep... which frankly is cake at just 24 cents! Check it out.
24
CENT SCANNING SERVICES