Buccaneer K.2 with bulged weapons bay and Douglas refueling pod carried internally until needed. If operating from a land base, install the SAAF booster rocket installation and use the S.51's larger underwing tanks. Ship-based version would use the standard underwing tanks. Both versions would have defensive countermeasures, electronic and otherwise, on the outboard pylons. Markings options could be British or other nations.
I don't know if structure and/or plumbing would allow underwing tanks on the outboard pylons, but this configuration with four such tanks would be impressive. Of couse, structural and plumbing updates to carry the slipper tanks on all four wing hardponts could yield the Buccaneer KS.3.