This is for the loco that Hornby made which had square axle centers.
Hornby OO Driving Wheel Set for Jinty/57XX/08 Locos Centre Wheel Drive
Hornby OO Gauge -Wheel Tender Wheel Motor .
Triang-Hornby OO Driving Wheel Set for Jinty/57XX/08 Locos Front Wheel Drive
HORNBY X8199 GEAR, THOMAS THE TANK ENGINE WHEELS X8873 COUPLING RODS+ HEX BOLTS