I have a 98 sienna that has a bad flex pipe on the exhaust. Toyota wants $1500 for the part. I was wondering if anyone has a website where I can get it cheaper or if it can be welded in cuz the muffler shops are saying they don't think they can. It's leaking oil out the backside of the motor, about a quart every 300 miles. it's possibly a main seal or possibly a head gasket, does anyone know of any problems that it might be?