I've got a KO Lee S714 grinder and from what I can tell, they never produced a manual for it. At least KO Lee can't supply one and I've never seen one on Ebay despite a year of looking fairly diligently.
I do have an old brochure that pictures both the S714 and S718 and they seem to be identical other than table travel. AIR, KO Lee does have a parts list on their web site that covers the S714 and I have a couple of pages of other info that may be of interest to you. Email me if you'd like a scanned copy in PDF format, though it may take me a few days to get to it.
BTW, so far as I know the $75 manual that KO Lee sells is primarily for their T&C grinders. The old Norton Toolroom Grinding books that sell on Ebay for $10 or so has similar info.
Mike