The F-86 is quite nice for that as well. The late versions can do supercruise! Wut.
Yes, that's what I thought.
In my experiment, I tried to keep it straight and level at 23000-24000 ft (isn't that easy to maintain zero vertical speed at those speeds without autopilot...) at full sustained power without engine overheat, which is about 95% power setting. It started shaking like mad past 450 or so MPH indicated air speed, and eventually accelerated up to about 560 MPH IAS. But it holds together and you don't start losing parts, just don't turn too fast or you'll lose a wing very fast. Ground speed at that point was above 1300 km/h, which to that altitude assuming normal tropospheric temperature translates to Mach 1.1564, so I would say it can supercruise.
Mind you the original F-86 was a transonic fighter, and while I think it could breach the sound barrier in a dive it couldn't reach it in straight and level flight in reality. On the other hand, in a ten-degree nose-down power dive from the apparent service ceiling of around 13000 metres this thing can reach true air speed of up to 1600 km/h without breaking apart.
Didn't really bother measuring sustained maximum speed at sea level.
My guess is that the flight model has a little lapsus in the maximum speed, possibly caused by someone read the TAS MPH from performance statistics and applied them as IAS, or something, but it's insanely fast nevertheless.
Also, the Sabre (among other goodies) comes with Ultrapack mod