One thing to check is does a duel filament bulb have the same ears on the outside for the bulb to latch if so then use the origional socket with a double filament bottom ,it may or may not fit but worth a look.The socket I posted looks like they are a universal style and you may find cheeper at local flaps and also there are different styles that may fit without drilling any holes .here are two I found that clip on the hole that may work. I used the clip on type and bent the tabs a touch to fit the smaller hole on my light .
