Suggestion On Transceivers

Hey guys, Can anyone suggest me some low power transceivers that operate within 300Mhz to 450Mhz. It should be a bare transceiver in the sense that I can use any modulation or encoding scheme I want. And I want a transceiver MODULE not a transceiver CHIP.

Thanks

that I can use any modulation

I don't think such a thing exists because there is a fundamental difference between the way you design an AM, SSB or FM transmitter.

Ok, if so is can you suggest me an FM transceiver.

Depends on the quality you want, these are good:- http://uk.farnell.com/jsp/search/browse.jsp?N=2031+202969&Ntk=gensearch&Ntt=RF+module&Ntx=mode+matchallpartial

Or cheaper:- http://uk.farnell.com/jsp/displayProduct.jsp?sku=1718687&CMP=e-2072-00001000&gross_price=true

Or maybe something like this http://www.robotshop.com/sfe-micro-miniature-2-4ghz-transceiver-umirf.html

Where are you (update your profile with geographic info)? What range do you want? What is your power source?