Years ago there were light chains sold here using the larger MES base bulbs.

I still have some of these, now arranged for parallel operation on a transformer and underrun a little to lengthen bulb life. Replacements for the plain candle type are still obtainable, but some of the fancy-shaped ones are very hard to come by now.

I have a few of these bulbs which I know for sure have been used almost every Christmas for the last 40 years! [Linked Image]