Check here. Send an email to Parts Shop. I am not aware of this part having replacement o-rings. Isuppose you could remove it and try to match what's there with aftermarket o-rings, but if the impeller housing is leaking (most likely), you will nedd to replace the pump, probably between $130 and $150.
2000 Dodge Grand Caravan SE
No matter what you fix, there will always be something else to fix..
"Warranty" is just another way of postponing the inevitable.