Last I heard the Cooper tyre factory in Melksham England re-started production for M/T about a year ago, after a US based factory suffered some fire damage.I don't know whats happened since but everyone is over here is having real trouble getting M/T tyres.
The guys I used to get them from have given up trying to get them. Hoosier tyres don't seem to have that problem. I'm on my last set of M/T radials but the general consensus is that the Hoosier equivalent, that most have been switching over to, is more consistent with the varying track temps we have over here.