There are tons of ladies styling DVDs out there and I think all include elements of arm styling. I've got Burju's (on2) and Susana Montero's (on1) and they are both good. If you have a favourite female instructor, you could try her DVD. Congresses are great for picking up new DVDs - most instructors sell their own DVDs, and there are always DVD stalls where they show bits from their merchandise.
You could also watch YouTube clips of your favourite followers, pick up styling elements from them and experiment (first in front of a mirror then on the dancefloor).
Do make sure that your arm styling doesn't interfere with the lead though - it's a common mistake improver/interemediate followers make and is one of the top pet peeves for leaders!