Adding Prop Guard Rollers

I am looking at adding some prop guard rollers to the trailer. I have a pretty steep driveway I would like to take it up for storage reasons. I tried it out today and the prop guard will go flat to the ground. I have a few questions, are there any places that make a kit for this on my trailer (from a sanger 1998 trailer)? And if i add some roller to the prop guard will that section of the trailer be able to handle the load when pull up that angle? It just doesnt seem like a very structural part of the trailer. I have done searches but nothign very suited to this type of trailer. I would prefer buying a kit or smoething as I dotn have alot of time for designing/making my own. I have included a picture of what the back end looks like. I saw another Sanger trailer like mine with what appeared to be a wheel clamp on kit that was clamped around the main frame (not the guard) and dropped down with 2 large wheels. It looked like a kit designed to fit but I cant find anything of the such.