You can buy the bulb and holder from the dealer. Depending on the dealer, it is usually less than $5.00. For that price, I don't know why you would want to fool around with soldering in a different style of bulb.
I do remember someone posting that they were able to find a replacement bulb without a holder from an auto parts store. I was not able to find one and I was not able to remove the old bulb from the holder.
