My Tradesman came with already sprayed very similar to a Line-X. I called a place while truck shopping and they quoted $500 for a short bed, not sure how much for a long bed. I've scraped Rhino with my finger nail before, wouldn't have it.
Price your steps on Rams website in the accessory section then ask the dealer what they'll sell them for. I busted mines bubble when they wanted almost $400 more for them. The place I dealt with was insane on add-on mark up.