mostly what Able said.
UK - Mick Boddice at Darley Moor - good day, definately a School, not a thinly-disguised track day - good instructors, progressive including cornering, hanging off, e-stops from 40mph up to [as fast as you like]. One 'free' session at the end. Their bikes (and lids, leathers, everything) if you're going to
worry about binning it. Been twice now, recommended.
Europe - ESS, without a doubt. Two day full-time school at 1:2 and then (if you want) a track day on the 3rd day. Much more track-biassed skills than the above, usually on your own bike - it will cost if you want bike hire as well, but they can (help?) arrange it. & you'll have to wait till September for Nogaro, but if you want abroad... or they do 'SPORTS' instruction days, at Brands or Silverstone I think - check out
www.europeansuperbikeschool.com .
California Superbilke School also have a pretty good rep, but a bit less flexible about "start here, do session 1 which covers this" - also track-biased & less track time. Their bikes all the time though.
Or for something
completely different check out Yamaha off Road Experience - their bikes, fields, mud, excellent instruction, all you provide is the falling off & the grins

AND it's in another country

You could also post this on 'trackdays' if you haven't already ?
tfd
ps let us know how you get on
Rubber Side Down
TFD
VFR750, CBR400
We've seen it all - Bonfires of trust, flashfloods of pain...
"you only get away with it
... until you don't"