Ok, after tons of searching and cross referencing, I found the Polarg equivalent to the 64111. First off; how I found out. Searching for the 64111 bulb turned up alot of sites showing the Osram bulb, and a bunch of sites listed the bulb size and base type, which is T2 3/4 (or T2.75) and a BA9S base. Going to superlumination.com, they sell a BA9S base LED bulb for 12v applications. I searched further using the bulb application numbers listed on there website which said
Quote:
1895 ba9s bayonet base bulb = 53, 57, 182, 257, 363, 1445, 6253
So then searching for 1895 bulb in Polarg turned up 2 choices.
Polarg L05 and M17.
Now, I would stay away from the M17 for the following reason. It listed 1895 for types it will fit but.....the bulb is a 8 watt bulb. Our factory 64111 is 5W and the backing to our map light housing has 6W stamped on it. So I would not go any higher than 6W to prevent burning wires or the plastic lens.
The L05 is perfect for this application though. Same coloring as the M17 but only 4 watts. The end of the bulb is designed different too. It has a convex lens to direct all light straight out forward from the bulb. Perfect for a map light. 
It says it outputs light 3 times stronger than standard applications.
Both give off the same white light too.
Pictures of both below.
L-05
Close up of lens
M-17
