Well I got my K-3 Packet 3 from the US Embassy in London...
The contents was......
IV15 - Instructions
Medical Examination Instructions
Medical Questionnaire
The IV15 instructions now simply direct you to download the forms from the Embassy website.
One strange thing the IV15 has been modified by hand to replace "Fiance(K1/K2)" to read "K3"..
and they have stroked through the D-156 form... Now I expect that in fact they meant to stroke
through the 156K (which is no longer directly available from the www.state.gov website)
So I've booked the medical... Now to return all the paper work!!!