hochiki smoke detector

  20150624_090113.jpg (Size: 775.61 KB / Downloads: 4)
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  20150624_091244.jpg (Size: 679.71 KB / Downloads: 4) Hi chaps

one of our sites has morley panel with addressable hochiki detectors
I need to install addressable hochiki heat detector same type as the ones in the picture ,

Its been long time since i worked with this type of detectors if any one can guide me where to buy them from will be much appreciated

I checked hochiki wep site but cant find them there ,which types of hochiki new detectors may work with the old software in the panel

regards