When you get to NAPA look for TRICO Series 51 heavy duty wiper arms. Certian models can be adjusted for length & adjusted for angle. The TRICO is stainless steel all the way through. Look Here for more info. (
http://www.tricoproducts.com/brochure.cfm?brochure=225&location_id=101)
I had purchased "stainless" wiper arms from a well known parts supplier. The arms never held the wipers securely & could never clean the windshield. The arms rusted & fell off within a year.
What's a FLAPS?