GKN.
Technically they have never been Hardy Spicer UJs.
Hardy Spicer make driveline products, Propshafts being one, CV joints another, GKN make bearings, UJS etc. Hardy Spicer have always (or at lease for a VERY long time, used GKN UJS in their products.
GKN and H/S have been partner companies since somwhere in the mid 80s iirc.