While waiting, I walked to the Gasworks complex for breakfast and gave Boss wreckers in Hemant a call to see if they had any Mazda3 BK hatchbacks available. They had 5x in stock but are no longer open on weekends so, after getting the car back from Mazda, I went home to grab some tools and went to Boss wreckers.
It was stinking hot and humid on Monday and I was already knackered from just walking to Gasworks, killing time looking around by foot and returning to Mazda. It was even hotter at Boss wreckers.
There was only one decent passenger-side rear door, it requires repainting due to surface scratches and is from a Black Mazda3 hatchback, the remaining two doors I needed on the other cars weren't salvageable.
The driver-side rear door of the black Mazda3 was in excellent condition.
This got me thinking, do I:
1. Just buy the left rear door and get it paint-matched yellow to the car, or
2. Buy both rear doors and get the passenger-side rear door painted Brilliant Black - no paint matching required and it'll make Buzz look even more like a Bee

I decided to get both doors to keep my options open and stripped them down to the door skins only.
It took me ages to figure out how to get the first window out without breaking it - you need to remove ALL the trim inside the window frame and the rail that the window slides down.
There were a couple of other trim pieces I found too to replace my worn out bits.
All up it cost me $250 for 2x rear door skins and some trim pieces.
The anal part of me says to paint-match the single rear door but the practical and childish side of me tells me to paint it black since it'll be cheaper and look more like a bee.
Either way, re-sale value has no impact on this decision due to Buzz's age and I plan to continue using Buzz as a DD until EVs become cheaper.
I can always keep my eyes open for a bright yellow door if I go the the black option.