Although nowhere nearer tracking this one down, it now transpires that it was owned at some point by Ralph Lauren.
My mum was far more impressed with this information than my Dad, who had no idea who he is!
I've been in touch with several of the US clubs, and Morgan Spares, and the consensus is that she's now back in the UK.
I've just sent a message out to Gill B, to see if she can put something in the next Miscellany.