Nikko Frame Buggy 4WD - Freq 5 Controller

[bremen68]

My boy was given an older Nikko 4WD Frame Buggy and controller... We
went home and put batteries in the car and controller and got
nothing... The controller light lit up, but we got nothing out of the
car... Then I realized that the radio was a Frequency 3 and the car
had a Frequency 5 Crystal set in it...

Anyone know someplace to get the crystals for the car or have an old
frequency 5 radio laying around? I checked eBay and came up blank
there.

Thanks!