Jamie - and anyone west of the atlantic...
With the probable cost of shipping rotors/discs from the UK at £35 which is almost $60.00, Rock Auto is a reasonable source. eBay also has listings
for 1989 Pontiac Lemans Brake rotors but be careful you are getting the solid version not the ventilated version.
The Rock Auto listing for the 1989 Pontiac Lemans 1.6L 98cid L4 Non-Vented (Solid) Front Rotors (Discs) is correct for the REAR discs to fit the Bob B. / Jeemy replacement hub.
Unfortunately, DJ got mislabeled or mis-packed discs from NAPA or their listing is inaccurate.
For those that don't know how to look up things in Rock Auto, this is their current list:
YES, the first listing is for Brembo discs at $6.66 each. Parts being cleared are usually amazingly inexpensive.
RA1-discs.jpg
RA2-discs.jpg
Just click one either one to be able to read it.
This is the listing under 1989 PONTIAC LEMANS 1.6L 98cid L4 : Brake/Wheel Hub : Rotor