I never heard those, but I did hear the smaller Radford Tristars from the late 70s/early 80s. Great speaker the Tristar. They were made by Arthur Radford of valve amp fame (eg STA15, STA25 etc). the Radford speakers would certainly have been considered hi-fi then. If the rubber mountings have perished, then Wembley speakers in London may be able to refurbish them. Have a listen and see if you and your friend like them.
Charlie
Charlie