I've begun work on restoring all the exterior lenses that aren't being replaced with new ones..
My LHS tail lamp assembly was replaced around 15 years ago after a minor bingle (not my fault) back when these were plentiful and inexpensive to replace as a unit. It looks clean internally but the outside of the lens has a bit of oxidisation. I hit it with some plastic polish and elbow grease only and it is looking great but i need to go over it with 2000grit first to remove some of the roughness. I only did the reverse light and a bit of the stop light section so you can see the difference. I won't even need to take this one apart to bring it back to new. I have a NOS assembly to replace the old RHS one shown:

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I'll post up pics once finished. I'll also fit new tail light rubber seals, as the old ones are cracking.
I went to do my front combination lenses and remembered that the LHS was cracked

But I also noticed that the amber lens was noticeably darker compared to the RHS (which was replaced with a new genuine one about 7-8 years ago). You could easily tell by looking at the car that 1 side had been replaced. This meant i would need to find a matching pair.
New genuine lenses in this style are NLA unfortunately. This is because Japan and the US used the all amber style lenses and Mazda produced less stock of the clear+amber type (being for Aus and Europe+UK only). Frustrating when they were only $30 each when last available.
About 5 years ago a certain person who shall remain nameless bought up all the remaining Australian stock and has been drip feeding them on eBay and Gumtree for 500% of the original price. I refused to buy at that price and they're all sold out now. I didn't want to buy reproduction lenses from Phils either. You can tell genuine from reproduction because OEM are branded STANLEY.
Anyway I managed to find a new pair a few weeks ago for a much more reasonable price #winning.

They have Ford logos so would've been sold by the dealer 15 years ago or so. They're still a lighter amber. I reckon the OEM supplier changed tint colours somewhere along the line. This can help you tell how original the front is!
Here are the newies:

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And (from left to right) here is a NOS replacement (15 years old?), used replacement (10 years old?) and used original factory fitted:

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I've already restored the side indicators (NLA new) and the results are great. Australian delivered side indicators are the same as Japan. US are in the same spot but use a different lens. These are both obviously different to UK and continental Europe which got FC style lamps fitted further back on the guards (or "wings" as you call them - I'm learning!

) I'll post up some before and afters...