I have finally found a custom chainring outfit (Warhawk Industries in North Carolina) that will make 122/74 BCD triplizer rings to fit a Stronglight 93. The attached CAD drawing is from them, based on a sketch I had supplied. I think they look kind of cool.

They'll be sending me a price quote soon. I had said I would be interested in maybe a half-dozen of them originally (assuming that a prototype model is found to be satisfactory) with the goal of keeping the price to a reasonable level--less than $100 each, I hope.

Would anyone else be interested in this? I'll report back when I have a price and then again when I have actually seen and tried a prototype--I'll post photos then, too. By the way, I'm not planning to resell these for a profit--just trying to keep unit costs low for an initial batch. My hope is that once the initial setup cost has been absorbed, anyone who wants one in the future can order it directly from them at an affordable price. Initially, I'm having them develop a 42-tooth ring, which would be good for a standard full-size 52-42-28 triple or thereabouts, or for a 46-42-24 half-step triple for old guys in hilly country (c'est moi) who are willing to use the right 5-speed freewheel to make the half-steps come out evenly.

The drawing looks good, but I'm not going to get my hopes up too much until I've seen the finished product. I already have one $50 failure behind me--had a guy in Virginia who supposedly knew what he was doing make me a prototype that was a flat failure. The two sets of bolt holes were correct, but he didn't make the necessary cutouts for the chainring to fit onto the crankset spider, plus the teeth were WAY too thick--too thick to fit onto a 1/8" chain, let alone a 3/32. He hasn't shown any interest in taking it back and fixing it, either. Chalking that attempt up to experience.

Anyway, if you think you might want one of these (again, assuming they're found to work well) get in touch with me at my regular email address, jonwvara@yahoo.com. I'll save those responses and get back to people if and when it's time to actually place orders.
JV