sounds it!
Is Murray MacLachlan still around to advocate perform and record (quite well to my mind, but I like Driver's pianism, what I have heard of it, very very much also) ? I seem to recall he recorded a disc or several of works by Chisholm...
(who I know of mostly because of his own friendship with, advocacy for, ... of Sorabji and his music, though I understand that his interests were very wide-ranging.)