You could probably go to Home Depot and get a 10' stick of 3/4 EMT steel electrical conduit to make the braces out of. Beat some flats on the ends and drill the bolt holes. Loosen all the bolts up with no load on it and see if all 4 wheels will touch the floor again and then tighten the heck outta the bolts when you get the new braces made.
Hell yeah. Something to that effect. The depot will have some kind of heavy metal I can cut up, drill out and use. I was thinking something to widen the rear wheel stance too.