Thanks for your reply Bigmig, since Mato doesn't sell the sets separately I guess I have to order something else along with it... On another hand I could desolder a set of 27mhz crystals off some Radioshack RC cars but I don't know if those are FM or not.

Are you positively sure that they have to be 27mhz? It's a shame I have to wait another few weeks to tank again.