EE here. 32V is 32V. Any power supply with an output of 32V DC and a current rating of over 0.7A will work fine. Do what you need to to get the connector to fit. If it's one of the simple coaxial ones, you can get them at Digikey.com. No need to buy a new scanner unless you want to upgrade.
eBay has several 32V supplies available at under $10: http://www.ebay.com/bhp/32v-power-supply
OK, with a little more Googling, I have found that the Canon K30286 seems to be a dual output supply: 24V @ 0.5A and 32V @ 0.7A.
The used/refurb places seem to be capitalizing on these supplies being hard to find, and offering them for sale with "price upon request".
Not necessary at all. The solution is to buy both a 24V and a 32V supply. Each should be available on eBay at under $10 used. You want a "1A output, regulated switching supply". Connect the negative leads of both supplies together, now you have GND, +24 and +32. If you can get the owner (tokam?) of a working scanner to apply a meter to his power connector, you'll know which lead connects to which pin and you're off to the races.
Last edited by Peter Simpson; 10-01-2013 at 11:25 AM. Click to view previous post history.