Interlinking hard wired smoke & CO alarms

I see on this US site http://www.kiddeus.com/CO+Alarm+Catalog.shtml that they have a 120v hard wired CO alarm that also can be linked to their smoke & heat ones. Reading leaflet it seems the smokes will set off the CO alarm with a different tone than when its sounding for carbon monoxide, which is clever.
Anyone seem anything similar this side of pond in 230V??
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Try looking here:
http://www.tlc-direct.co.uk/Main_Index/Fire_and_Smoke/Kidde_COSM /
Mogweed.
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Doh! Just realized that these are battery only. The Kidde website (http://www.kiddefyrnetics.co.uk /) makes no mention of mains, interconnectable, combination smoke/CO alarms so I guess they don't do them for this country.
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