Yeah, finding a 22 hole rim would be challenging, I can’t think of one right now.
I wonder why Campagnolo chose 22 holes.
Some rims you can get custom drillings, but one has to wonder if the likely upcharge and limitation in choices is worth it, especially considering that very nice front hubs are not all that expensive, and you’d have a new hub, with new warranty and all that.
The rear would make some sense, since those are more pricey to get, but I’d probably recommend a little deeper and stiffer rim to make the 24h work well.
If you are a very light rider, you could probably get away with a shallower, lighter rim.
"Nothing compares to the simple pleasures of a bike ride," said John F. Kennedy, a man who had the pleasure of Marilyn Monroe.