As for the USAF not exporting boom technology, that is utter nonsence. Spain (KC-97), Israel (KC-97, B707), Iran (B707, B747), the Netherlands (KDC-10), Australia (B707 and soon A330), France, Turkey, Singapore (all KC-135) all have boom-equipped tankers.
The RAAF 707’s are not equipped with the boom, and all F-111 AAR training is done (for the time being) via USAF KC-135’s.