Good luck with your search. We live just outside of Houston and when we decided to look for a Hi-Lo we found that they are few and far between in Texas. One piece of advice though, look in north and central Texas for one because if it's near the coast it's probably been to the beach somewhere and the salt is very hard on the frame and undercarriage. I hope you find a trailer and one other thing, if you ever have any problems or questions, there are people on this forum who could have probably built a much better trailer that the Hi-Lo factory did. They really know their stuff.
Happy camping and be safe