Here's the site for Jan Crystals in Florida, [www.jancrystals.com] A decade ago I called them for crystals to a 460MHz Regency old taxicab transceiver to use for my GMRS repeater. They asked me for the make and model # of what the crystal were going into, and they pulled up the data from their library of photofaxes and told me what I needed to get, and for what TX / RX FREQ's for each crystal. If they don't have the make and model #'s of the rig you have, they may request a .PDF copy of that from you to: (1.) Determine what crystals will work for your needs. (2.) To have that info for their own library. Tid for tad. Hope this helps.