Chipcon Transceivers (CC1000) - Change Operating Frequency to HF?

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Hi,

I'm currently doing a RF project and I need a transceiver IC operating
at the 40 Mhz range with FSK. I'm having a great deal of trouble
finding one at a frequency this low.

I'm interested in using a Chipcon transceiver like the CC1000 but it
has a range between 300-1000Mhz. Is it possible for the CC1000 to
operate at the 40Mhz range ? Eg use a tuning diode ?

Thanks,
Jeeves.