Mike, the rear beam bushes for escort and sierra part numbers are different, both NLA.
Sierra Rear Subframe Outer Bush 6141919 NLA
Escort Rear Subframe Outer Bush 6791604 NLA

I just checked my invoice and the front top strut mount cups, bearings and group N bushes came to around £43 from Ford which is almost half the price Woodford is charging.

Thanks. Lee.