So which new tanker has Bubba Boeing come up with since the 1950s? I don't include changing engines or avionics in that question.
Yes, they had the KC-50, KC-97 and KC-135. Not much since then though, apart from recycled KC-135s - the KC-10A being a McDonnell Douglas design.
A limited capability tanker? You could dumb down the KC-45A to the KC-767 level if you:
1. Reduced the fuel by at least 20 tonnes (that's 44000 lb to the colonials) - or, if you wanted to use a normal 10000 ft balanced field at ISA/Still-air, make that 35 tonnes / 77000 lb due to the KC-767A's poor ASDA requirement at high AUW.
2. Reduced the size of the underfloor cargo bay and narrowed it.
3. Took out all the seats and blanked off the windows, narrowed the cabin and shortened it, then fitted Urrmerikan 'Rendition-Class' palletised seating.
4. Removed the wing pods.
5. Removed the centreline hose.
But hey, go ahead and let your ignorant redneck jingoistic hor$e**** take precedence over capability for the 'war fighter'....
If you want a second rate, expensive and unproven design, take the risk and let yourselves be robbed blind by 'ol Bubba Boeing.