After almost 10 years I just put new wipers on our rig. Ours are 32" and hard to find at a reasonable price. I paid about $80 for the pair back in 2005 and had them stored all this time.
I've seen only one RV place that carried the 32" blades as open stock. I had to buy mine through a Newmar dealer.
I saw the wiper springs at NAPA but didn't buy any because ours work fine as is.
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft
Charter Good Sam Lifetime Member, FMCA, SKP
RV'ing since 1957, NRA Benefactor Life, towing '05 Odyssey