I have a few old recessed lights that are pretty tired looking & I'd like to replace them. The holes in the ceiling are exactly 5" and have the metal plate from the original fixture. All the replacements I can find are 5.5 or 5.75", so they don't fit. I'd really prefer to leave the metal plate in place and not make a mess enlarging the holes.

Anyone know where I can find a 5" can that's really 5"?
Or a 4" one that's 4.75 or so? The 4" ones I found were all 4.25"

Thanks!