This will give you the chance to visit the Mato web-site and order a set or two.I have used RC RED HAWK crystals ordered from tower hobby for a little less than $5.00 dollars and $3.99 shipping.I bought 3 sets and the shipping covered them all.I think your transmitter and receiver require 27 MHz FM crystals.Crystals just plug in and it don't mater which direction they face(but there is one for the tx-transmitter--and one for rx-receiver). BIGMIG