Unable to buy System Sensor Smokes & CO in Canada - any other recommendations?

[benze]

I was all set to put an order in for a set of System Sensor 2-wire CO and Smoke detectors (Cosmo-2w, Cosmod2w), but just found out that they are not ULC certified to be sold in Canada.

Can anyone recommend other equivalent products that I can use instead? I am looking primarily for 2wire smoke and heat detectors, as well as CO detectors.

Thanks,

Eric