Just checked out Tom's suggestion. Looks OK?Good. Smaller than H99 type. The one with the self contained xfr may be what you're looking for, as you said the NMC is 'in-place'. ETL listed; damp loc., MR16/MR10 & trims to suit.
I've actually used them outside quite a lot over garage doors and in my garden arbor this spring. The ARLV 2500 trim in white, and it takes paint pretty good too.
HCE727, with the bulb in the 2500 fixture, there is minimal space, maybe for tiny bugs. I have not had any problem or complaints. They are installed in a billionaires home [not kidding], in approx 30 locations, and if anyone was gonna complain about it, they would have.