As far as I know,these Mizuho rigs are still sold by Waters and Stanton in England.Their website is something like www.watersandstanton.co.uk
I own a Mizuho MX-7; I bought it from them by mail-order a few years ago. I needed a QRP rig for a cross-
country skiing tour in the Canadian Rockies and this Mizuho seemed the smallest rig available:about the size
of a conventional walkie-talkie;no external battery pack needed,batteries will fit inside.
Works as advertised;drawback is lack of side-tone on CW;and receiver is prone to cross-modulation on 40 m
in the evening in Europe, though there is a very easy modification for this which makes the receiver good to
use here. RX will probably be OK in the USA,has more than enough sensitivity.Have never tried SSB with it...