Frame rust

AMD makes em they aren't that expensive and if you can spot / plug weld you can do it yourself , just get the car supported in the air level and solid and do 1 at a time , drill out the spot welds on the old one then use some pan head self drillers to position the new rail and start welding .Preparation and supporting the car with the suspension removed are the keys .Don't try to do too much at once .