Fred,
The RV store that you went to obviously does not know anything about high end coaches that use Girard awnings. The entry level automatic awnings use a sensor on the awning that is usually a vibration sensor to detect high winds, but the Girard awnings that are used on high end coaches use the anemometer (wind sensor) that you are referring to. You can purchase a replacement from Girard or if the only problem is a broken cup, there are several hacks posted on this forum to just replace the cups.
Gerald