I have an early ZD Mk0 model and am looking for 11m crystals for it. I believe they use Type: HC49 crystals. They look very similar to the HC25 crystal, but with thin wire legs instead of pins. And I need the 41.4875(27.0-27.5) and 41.9875Mhz(27.5-28.0). Anyone know where to get any?