RV Parts Dealer - Halogen Lights - These seem to get hot, and over time the plastic insides fail due to heat stress. Replacing the Halogen bulbs for LED's should solve this issue.
Overhead Halogen Lighting - RV - I carry one spare of this one in the large size, and want to change the other type to these in the smaller size, if I could get the fixtures as a direct replacement to what installed now. That may not work in the underside of the cabinets where they are installed.
Here is two links to the type of ceiling lights many of our alpines have.
Additionally, Kustom Coach Works, Bobby Vodden, 541-581-3371 can get them, with LED bulbs cheaper than many.
Hope this helps.