Hello Havic,
You can go on Amazon and buy the doorstraps that are made for jeeps.I replaced all 4 of mine the first week I had the expedition. They work great and it allows you to open the door further than your current set up.
I'll see if I can find the link for you.
https://a.co/d/dvIk0E4
I'm not sure about how to mount them on the side of the unit which to me would seem somewhat hazardous in the event of a roll over.
After careful consideration, I went with a couple of 2.5 gallon "Wavian" jerry cans (5gal total). They sit on a rack and are considerably lower than the roof line...
Or! You can dump the whole idea of the conventional everyday RV toy hauler and buy something that is built like a brick shit house.
Merhow, a company that has been a leader in horse trailers for almost 75 yrs builds toyhaulers with custom living quarters that isn't thin particle board with glued...