Most or all of those items are not FR. They get their parts from third party manufacturers so that is where I suggest you look. Hard to know what exactly was used in an 8 year old trailer, but you could checkout these manufacturers's websites
Stove top - Suburban or Magic Chef are common stove tops and ovens
Micro - Magic Chef (or measure the opening and buy one you like)
Ladder - no idea, but there are online RV stores that might have something. Maybe Camping World?
Steps - Same thing. Measure what you need and check out an RV store.
Generator - these are all aftermarket items and really depends on size, type, etc. Onan is a common brand used in RVs but there are others. I don't know what was used in your TH.
DW, 3 Kids and our Goldens
2012 Shamrock 233S
2008 Toyota Sequoia 5.7L 4WD