I sympathise. Last time I was in London and had a few minutes to kill I went down to New Row to fnd Ashman's (now part of Mole Jazz) had gone. Thank goodnes Ray's Jazz & Blues shop in Shaftesbury Avenue is still there.
RtS (my former colleagues blamed my move from South London and the loss of my almost daily custom for the subsequent demise of Chris Wellard's New Cross shop)