1993 Buick Century Cracked Suspension Trailing Arm? -SOS-

Suspension problem
1993 Buick Century 6 cyl Front Wheel Drive Automatic

Hello. I'm very desperate for any kind of help I can get about my 93 buick century. I discovered a cracked rear suspension trailing arm about a month ago. I'm not sure if that is what its called, but it is a bracket of sorts that connects the rear axle to the unibody below the backseat. The rest of the body is in fairly good condition, but the area around the arm is pretty rusty. I've taken it to local body shops and basically have gotten no answers. Most won't touch it because of the age and the rust. One guy said I could have the arm cut out of a junked vehicle and welded on to my car, but then the rear axle would need re-alligned and it would be fairly pricey. The car has high-miles, but engine & tranny are in good shape and I've put at least a grand in new parts in the past year. I wouldn't mind putting a few hundred more into it. Salvage yards are only offering me peanuts and I don't want to junk the car. It's been in my family for 3 owners and has had routine maintenance and is a good car. Any suggestions would be greatly appreciated. Thanks in advance!
-Dave