Just spotted that www.surplusshed.com have brand new, never used CTI AOM crystals (Model 3200-142) including bragg mounts for $14 each ...
They are apparently coated for down the blue end of the spectrum (442 - 488), but it would be interesting to see how far they can be run outside that before the losses become unacceptable.
An RF driver will have to be devised (got to figure out the frequency first, possibly 32MHz?? Anyone have a network analyser?), but if these could be talked into doing say 532nm the possibilities become interesting.....
Thought some of the gas heads might be interested (For the mount if nothing else).
Regards, Dan.