Do they all exist somewhere!?

I would like to install some smoke,heat and CO alarms in the house, powered
from the alarm supply, and connected to the alarm.

I can find simple smoke alarms that will do this,
http://www.tlc-direct.co.uk/Products/TLSD12.html
but not heat (kitchen) or CO alarms that are 12v and have contacts for the
house alarm.

Any pointers?

Ta

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Sparks...