Check EBay and Craigs list, that is where I got both of mine, fronts and back, and O'Connors rear bushings ALL for about $115 to the door.
Remember, you and EVERYONE else here, on the forum, are looking for this stuff, and safe to say no one here will offer these to you, let alone at an affordable rate. Supply and demand my friend, not gonna find it when everyone else wants it too.
Do the 400EX instead of the 250r, you can get a much newer shock at a better price, and it is an awesome upgrade to the rear of the blaster, trust me.