HI all, quick question to the series owners

I am using anti burst locks locks for my 100" defender build and wasnt sure why the door strikers where £10 different in price.

Is it because one is also used for the back door on a fender,
Also are all these the correct part numbers and is paddocks the best place (price).

395037 = RH Door lock
395038 = LH Door lock
FQB000040 = Striker £5.56
FQB000050 = Striker £15.50

Thanks Ben