I ordered a couple different type bulb sockets for 1157/1154 bulbs and when the arrived went about converting a couple of old parking light housings (well the bulb holder anyway) to the dual filament sockets.
Pulled out the bulb holder and socket and ripped the original socket off, then used a step drill to drill out the hole where the socket was to fit the newer socket (drilled to 5/8" then filed the hole for a snug fit on the new sockets. The new socket needed to be pushed back farther in the bracket than the original was because of the difference in bulb sizes to get the filament near the center of the housing. The photo shows the difference between the original #63 bulb and an 1157 I had laying around. 1154's should be very similar. I bent the bulb holder bracket a bit to get the bulb deeper in the housing so it didn't get too close to the lens.
A little tack weld to hold things in place and insure a good ground.
One caveat: The offshore sockets I used were marked for 1157, but the bulb wouldn't fit because there was an extra fiber washer that didn't let the bulb go deep enough to turn the bulb into place. Removing that extra washer, leaving just the plastic one worked. I found that out after welding the sockets in place.
Fortunately, the fix was easy. So much for QC on Chinese products.
By the way, those rusty housings are not the ones I'm planning on using. I have nicer ones.
