John, I posted this question because Masai's website says it works on older doors but the inner panel needs to be trimmed. I am hoping somebody can give me feedback on this route instead of plan "B" which we will now call Adam's method.
Adam, do you still have a parts number list?
It's a Britpart kit (DA4664), if that sways you at all. I've had a few trucks pass through with them installed and everything worked well enough. For the price it's probably a decent starting point, even if you decide to make your own harness.