All you need to do is to put up posters advertising your proposed club. Local supermarket notice boards, vet centres and pet shops. Put an ad in the paper. Arrange to get a group of interested people together and get yourselves interviewed by the local free paper (if you have one) or as a special interest story in the daily paper.
I am happy to design and print posters for you (I do it for a living) when you know when and where you will meet.
Our club started with an ad in the local paper asking for those interested in starting a fish club to ring the given number. The person then contacted all those who replied and said we will meet at our house at this address at this time on this day - and that was the beginning.
Get yourselves organised, don't sit back and wait for someone else to do it. If I can help in any way, either practical or suggestions etc, don't hesitate to ask.