1990 Southwind, Correct Rear Disc Rotors?

[bgbevan]

Need new rotors in the 28' 1990 Southwind with 60K miles on a 1 ton Chevy chassis.  Not sure if I want to tackle the job or let local brake shop do it.  Either way, I want to purchase the rotors ahead of installation.  Lots of different rotors from local auto parts stores and on eBay.  1990 Service manual says these are part of brake system JF9 and specs the disc at 13.75" x 1.54".  Is this correct?  Can I use a P30 1 ton profile or is the RV system different?  Is there an OEM part number for these rotors I can use to shop with?  Any suggestions for brand and/or seller?  Do axels have to come out?  If I can get another 25K miles out of the coach, I will be happy.

[DaveVA78Chieftain]

JF9 - Hydroboost, Front disc, rear disc
NAPA catalog says 1980-1995 P30 rear rotor P/N is: NB 4885925
1985-1995 Front rotor NAPA P/N 4885980

FYI
JB8 - Hydroboost, Front disk, rear drum
JB7 - Vacuum booster, Front Disk, rear drum

NAPA ecat: http://www.napaecatalog.com/erack.php
Mill Supply: https://www.millsupply.com/pdf/stepvan/gm.pdf

Dave