Just bought a set of tyres. Metzeler M7 RR are used on the KTM390 Cup series as the control tyre, consequently you can get a set in lightly used condition for £75 posted. And they are correct size being 110 70 17 and 150 60 17.
I have used ex-racers tyres before on road and track and they are usually perfect. Worth checking the manufacture date, but these are from this year.
Dave