It's not 1000 bucks, depending on where you go to its anywhere between 100-400 bucks, A buddy of mine had his welded for 75 bucks each side when his rear passenger side shock ripped through the tower...
Shop around and get some quotes! Or find someone who's good at welding, go to the junkyard cut the piece you need, weld it on your car, reinforce it and you'll be done!