Reply from the finder:
Thanks for your concern.
We did points 1 and 2 when we found him and advertised for free in the local paper. Only recently figured there would be web sites, we have now registered him on a few, will check your list, thanks.
Fear not, if we don't find the owner, we will either find a good home or keep him, in spite of our other lodging moggies protests, he is indoors with us and being "toilet" trained !
Cheers
Ian