For the brake rotors just search Fleabay under "Jaguar XFR brake rotors" and you will get dozens of hits including drilled & slotted, that's how I found mine about four years ago (I think they are Hart brand).
Another popular brand among forum members here is R1 Concepts.
I am assuming your 5.0 SC has the same brakes as the XFR - 380 mm front rotors and 376 rear rotors - but it is possible it has the 326 mm rear rotors.
For ceramic brake pads (not to be confused with carbon ceramic) there are not many choices other than EBC, either Redstuffs or Yellowstuffs.
The reds are a street pad and the yellows are more of a track pad - better bite and track performance but noisy and dusty for street use.
Mixed reports about the EBC pads, some love 'em others hate 'em.
Or else you could go with what I have on the F-Type - Porterfield R4S.
These are a carbon kevlar compound and I have been very happy with them since I fitted them 17 months ago, good progressive feel, good stopping power, minimal fade, very little noise and very low dust.
I got mine from LPI Racing, see here: https://www.lpiracing.com
Cheapest seller I could find although forum sponsor Velocity AP also sells them.
If you have the 380 mm front and 376 mm rear brakes the Porterfield part numbers you want are;
Front - AP 1448 R4-S
Rear - AP 1449 R4-S
If you have the 326 mm rear brakes the part number is AP 1095 R4-S.

 

 

You could order them directly for R1's website as well.