I was going to recommend the bridge bigjohn has for sale, although I didn't know he had one for sale!
I'm sorry to hear you are having some issues. I have one of these basses and it's great. I've had no issues. I actually got a SD antiquity pup for mine as I bidnapped a cheap one on EBay so have my original spare if you get stuck.... however I think change the bridge first and hopefully you'll have a sweet bass. Problem solved. I don't want to take money off people unnecesarily! The two saddle bridges obviously aren't as good as 4 saddle ones which is why Leo changed them. They're not terrible though and I actually have 2 basses with the old 2 saddle set up.