Sorry to hear about your cat. I saw the date of this post and wondered if you had now found her yet?
I don't want to get your hopes up at all but there is a torti cat in our garden crying each night (for last few weeks now). I do not know if it is a girl or boy and it is very timid and very vocal. I have asked all the neighbours in the few roads by wedmore street but no luck so far. Wont let me near him/her either so have been unable to help it really.
Does your cat wear a collar?
please do let me know.