What kind of micro bulb is this?
The terms I'd use to describe them and to search for are "SMD incandescent lamp" or "surface mount incandescent lamp". Using those search terms I found a company called JKL Components that seems to have a range of SMD Lamps. I've never seen them stocked at more general suppliers so you might find them a bit tricky to track down.

Something you'll need to do (and should do when asking identification questions in general) is measure it's dimensions and the spacing between pins so you can check that anything you find will physically fit. It's worth double-checking but presumably they'd be driven from the 12V system so you'd want bulbs in the 12 - 14 V type range.