I think this might be the maker of the mold. His name is Jeff Tanner and his website is:
http://www.jt-bullet-moulds.co.uk/
I've ordered specially sized molds from him in the past, but I honestly can't remember if I recommended him to you or not. Either way, if someone needs an odd sized ball mold I can't recommend him enough. Like Charlie said, his turn around time is very fast, and his prices are reasonable.