I need to replace Pac Fab Challenger Impeller seals. The Pac Fab unit has marking number 35-54-60. Under this tag is another tag that reads: CHII-N1-2FE. 2-16-L96 Self Priming Pumps. Label #35-5338. After I removed the Impeller housing I saw that it had on the impeller: 35-5303 3 Inserts. and 35-5497 6 Inserts. Not sure what all this means but I have two (2) seals inside the impeller unit that need to be replaced. Thank you for your assistance.