sailboy,
You might try your local well-drilling supply house. 1-1/4" is a very commonly used pipe size in the water well industry. He may have only forged brass valves on hand but can get either bronze or stainless easy enough. Many of them sell products from these guys who you can see make all three types of ball valves, and yet others.
Legend Valve
You might also consult Grainger, although you'll need a commercial account to order from them, if there's one in your area. Here's a list of a few of their bronze ball valves.
http://www.grainger.com/Grainger/wwg...eMatches.shtml