All the RAF Sabres were made by Canadair ( Mk.4's) and it doesn't look like they ever were fitted with an MB seat.
but this might help, found on The Aviation Forum, you could use anything from the Meteor, Vampire, Venom, Sea Hawk --- :
1 Meteor
1CA Canberra
1E Meteor
1F Venom
2A Attacker
2B Wyvern
2CA Canberra
2CB Canberra B(l)8
2D Sea Hawk
2E Meteor
2F Venom
2H Hunter
2HAN Hunter
3A Valiant
3B Vampire T11
3CA Canberra
3CS Canberra PR9 Pilot
3CT1 & 2 Canberra T4
3CT3 Canberra T4
3H
3J Javelin
3K Vulcan
3L Victor
4A Sea Venom
4BSB & 4BSC Lightning
4DSA Sea Vixen
4HA Hunter T7
4MSA Buccaneer S2
4P Jet Provost
4QS Canberra PR9 Nav
5A Phantom
6MSA Buccaneer S2
6MSB Buccaneer S2
7A Phantom
9 &9A
9B Jaguar
9D Harner7a
10A Tornado
10H Sea Harrier
11
12 Harrier GR7