S80 non turbo stock exhaust replacement
 

Hello,
I have a 2000 S80 2.9l non turbo with the original exhaust that has a leak I believe in the muffler(s) area.Have yet to go underneath to locate. Anyhow, the mystery here is has anyone done their own replacement and if so any advice? Also, looking for a source for parts other than dealer. Walker does make the parts but I am not a fan of Walker quality. Also, is the exhaust from the cat back a one piecer from the dealer? I am interested in losing the pipe clamps for the original lasted 10 yrs and the original appears to be all welded..nice!
Any info/advice appreciated. Budget is tight and probably will do at home if possible.
Cheers,
S80bluez