Are you sure they fitted power racks to the last Cabbys? There's nothing in any of the catalogues I've got about power steering and there is no Mk4 Escort power steering rack listed on Microcat (although there is an air-conditioning system!)

I thought the motorbility cars were retrofitted with PAS by motorbility themselves using aftermarket racks. Could be wrong though.

A Mk5 Escort rack won't fit - the mountings are totally different.