Also, I just noticed that there is no such thing as an individual 1.5w LED.

I think this is an under-used(?) 1W LED.

If I can€„¢t find a direct replacement I€„¢m considering flipping
the PCB it€„¢s soldered to and using the copper side to solder a SMD
unit. That way can dissipate some W.

But that presents its own set of problems. Optics will need to be matched to
the new LED.

Hmm...