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not sure on housings...where has Numberdummy been?
bezels are year specific I am pretty sure, try eBay. make sure seller has correct year on listing. or search the for sale ads on here...mine were rusted so I sanded and painted a silver with a flake in it, think it turned out ok. just another option if you come across rusted bezels. flash makes paint look splotchy...but it isnt
The actual mounting housings are all the same as far as I know. The bezels are different. I think 57-59 might be the same(or at-least pretty close), but the '60s are shaped differently.
They are all different. 57 being single lamp headlights, 58 is dual, 59 and 60 may be similar but you need to watch the space between the lamps on those. The 58 is closer together than the 59/60.
As far as the 58,59 and 60 lamp buckets, these might be interchangeable. The bright metal retainer rings should be also.