Parts for appliances like cook top, furnace, fridge, etc. can be found from the vendor of the equipment. And some of these parts can be found on eBay.

Parts for breaks, axles, charging system, etc. can be found from those vendors.

There is a Forest River Owners Guide app. You can download it from the Apple App Store or Google Play Store. It contains electronic versions of user manuals for the various R-Pod components over the past 6+ years.

And you can type in a part/problem in the search field of this site to find out how other owners have solved similar part problems.

Hope this helps.