From the 'not for your show bike' department, I have a 46 tooth Stronglight 99 chainring (86 bcd) that's a good news/bad news part. I got this in a lot of Stronglight rings a while back, and I don't have a 99 crank. Anyway, the good news is the teeth look like it's never seen a chain. The bad news is there's some serious corrosion on the chainring body, including one of the mounting tabs. Some of the corrosion is deep; this isn't just something you can buff out. But overall, it looks like it would work, and it's an uncommon size in an obsolete bcd.