As our chassis is a P30 Chevy one of the best resources I've found for chassis parts is Mill Supply. Their site for Step Vans is very comprehensive. Check out www.millsupply.com
. The prices are very low. Also some parts that they have for P30 stepvans are hard to find anywhere else at any price.
I have used them for a lot of parts on my last coach. Saved a bunch. They do have wiper parts and complete systems.
Hope this helps. Excellent delivery with most parts shipped same day too.
1984 28' Funeral Coach
Former Rolling Showroom & PuttLab (now party bus)
"I'm not an expert. But I did sleep in an Airstream last night."