Anyone have any advise on where to go for large (up to 24x36") digital scanning and giclee printing? I found and they seem to have what I am looking for, but I though I best at least try asking around before I drop the cash.

I'd stop by Columbus Camera Group and see if they recommend anyone/place.

Maybe check with OSU/CCAD as well.

whatever Franklin Blueprint is called now, they do over size scanning for engineering drawings and whatnot.

Or you can use a regular flat bed scanner and do it in sections and piece the individual scans together into one file