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remote controlled doorbell

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I bought a remote controlled doorbell; the transmitter module consists of a PT2262 encoder and an HDR433M modulator; the package includes just two transmitters, to be used as remote switches for the doorbell.

I'd like to use this package in a different way, thus I need some more transmitters, but I am not able to find PT2262 (or HS2262) from Europe resellers, only from Malayisa, Taiwan, and so on: they don't send abroad, or they have high S&H fees.

Does it exist any european reseller for these encoders? Or does anybody know any site offering free schematics to build similar transmitters with easier-to-find components?
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