749 steve...yep but its a case of what you can get hold of....and of course the cost.
Managed to get the RS 2K rear beam complete with handbrake cable, new disks, hoses, pads, back plates, good shoes and a new caliper. With the bonus of front struts with new disks, new pads, hubs etc all at a fantastic price - just the travel to get them.
Ended up getting the spacers made up at a local engineering works.They need finishing and a coat of paint now.
Marvin