OP has a 2002
ISC 8.3 and all of the pumps on Ebay are for the older (98 and older) mechanical pumps.
OP, doubt you will be able to just change the pump as the new units use a different base... you will have to remove the five lines and change the entire transfer pump assembly. I did not think $212 was that bad a price.
This post is my opinion (free advice). It is not intended to influence anyone's judgment nor do I advocate anyone do what I propose.
Sold 04 Dynasty to our son after 14 great years.
Upgraded with a 08 HR Navigator 45โ...