I believe we have exactly what you're looking for, for your 2019 Shasta Phoenix 5W!
Check out the Adjustable Width Trailer Hitch Receiver for RVs # 13703.
This is an adjustable RV hitch that can fit a variety of frame widths, specifically 22" to 72" wide and has a maximum tongue weight rating of 350-lbs so you will be able to carry your generator an e-bike carrier.
In order to determine if this hitch will fit your 5W, you are going to just need to measure from the outside of the left... view full answer...