There are tons of RV salvage yards near us here in NE Indiana! Check out this link:
https://www.rverscorner.com/indiana.html
Alsp, check out
Bontragers RV Salvage I have use them in the past. BTW - if none of these links produce, do not give up! There are hundreds of little guys near Elkhart/Goshen/Shipshewana areas, so, every time you call ask for anyone they might recommend.
In lieu of all this, if you come to NE Indiana, plan on spending a week or more! If it is available anywhere you can find it in the RV capital of the world.