A bit late with the reply, I don't know how I missed it, but anyway, I've got a J83 with traction tyres and have just e/mailed modelspares in Burnley about a set of drivers. If you look at their site and go to page 5 of steam engine spares, you'll see them listed. I'm also about to start turning up a better fitting set of axle bearings for it (and another couple of Loco's) out of ptfe rod, as the axle hole seems really sloppy. I'll try and remember to let you know how it goes.