OCR services?

As part of a IMLS grant we’re working on, I need to find a company that will OCR and double-key about 165k entries from the Index to American Botanical Literature. The entries are spread over a number of volumes. I already know about Digital Divide Data – they were the company we had originally approached about this project, but that was a while ago, and if there’s any other companies people know of, I’d appreciate hearing from you. Thanks!