I have a chance to buy a Fluke 289 "as-is" for a hundred bucks U.S., but before I buy it, wonder if a schematic is available for it. I sent Fluke an email and they sent me the calibration manual which, according to Fluke, included the schematics, but the calibration manual is just a calibration manual. Are Fluke schematics available? Also, are application specific parts like custom ICs available? Thanks for any insight.