Prius V owner looking for a answer

Hi folks, not finding the answer on the V forum. I'm a new owner of a 2015 Prius V v! There' no engine block heater and I will need one next winter. The dealership has them but at twice the price from other sources I've found KAT 11813 and Temro 3100129 but listings only show up to year 2014 or something like that. I know the engine is the same from 2012 to 2018, some minor modifications in the latter years like piston rings. Does Toyota have copyrights for a X-mount of years back and that is why the other sources only show up to a certain year. The above mentioned block heaters, would they fit in my 2015 is the question? Thanks in advance and lucky to be on this Prius site which has a vast amount of information & knowledge!