MH salvage prices aren't like you pull it prices ,especially harder to find parts plus difficulty of removal, disabling ability to roll it after that. But I hope you get lucky. From what I think I read the first recall replacement Monaco trailing arms were not much better than originals. The Source Engineering arms have good decals installed , at least my friends arms do. Source shape is definitely different. Those may help to identify the ones you want.
There's not better spent to upgrade them due to reliability and safety standpoint.
95 Monaco Crown Royale
M11 400hp, 4060 trans.
Aquahot, Generac Guardian7.5k