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Welcome to the FFO!

Light assembly lenses can be difficult to find.
Keep looking it may take a long time to find what you're looking for.
The Ford taillights are different than Mercury. And there were different trim levels like the LX that may have had slightly different lenses

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On ebay a used left side sold on 10-10-2022 for $98.65 shipped
And a NOS pair sold for $100 on 11-11-2022 with free shipping.

And these
1983 1984 1985 Ford LTD II Sedan Brougham NOS RH REAR TAIL LIGHT LAMP LENS | eBay
1984 Ford LTD II Sedan TAIL LIGHT LAMP LENS #E3DB-13440AE | eBay

I believe the part numbers are going to be
E3DZ-13450-A and E3DZ-13451-A

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Thank you. do you know of any other models that the taillight assembly may be compatible or interchangeable with?

Lenses for Mercury Marquis will fit. They just will not looK the same.
Other lenses that may fit because all of these vehicles are FOX platform, (none will look correct for 4 gen LTD - 83 to 86)
Similar years of
Fairmont/Zephyr
Granada/Monarch
Thunderbird/Cougar

There may be more

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Mustang may fit. (And Mustang is always a very popular model then and now) However it will not look the same. And there is a possibility it may not fit. However, if you do buy Mustang lenses and you don't want them, they will always resell.

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A comment about lenses.
They ain't cheap. And if you can find them that is better that other vehicles.
I have 66 Mercury Park Lane. I would like a left parking lens. It is about 3 inches tall and a couple of inches wide. One year only. NOS are no longer seen. Used ones are seldom seen.

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Good suggestion.
It has been awhile since I have been there. I work up at Desert Ridge. Not too far away.

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