You might contact Perk L.L.C. and see if they can get the Euro bulb setup if you want a stock look. They show it on their web site for $45. It's the stock setup the MB5 comes with overseas and the bulb is a separate piece from the outer shell like on a modern car headlight, though it's probably all glass.
There was an Ebay dealer recently listing NOS original Stanley bulbs for the MB5 and other Hondas from the periof for $50. I didn't verify it was truly the correct MB5 part number, and their ad is currently not up but it may return. That is cheaper than they typically go for on ebay.