Any dating advice for a guy who has kids but doesn't want any more?

I'm 31, I have three daughters from a previous marriage, I've been single for over a year and I am ready to find someone new. One thing that I foresee being a problem is the fact that I had a vasectomy after my third daughter was born and I don't want anymore kids. That limits my dating pool to women that have kids and don't want anymore or women who like kids but don't want any of their own. In my experience so far, both of those types of women are hard to find. I'm open to internet dating sites, but I've had the same problem there as well. How does one go about meeting people in my situation? I'm a great guy with a lot to offer the right person, I'm pretty cool and I have an attractive personality that has always been able to attract women, and I HAVE attracted a few over the last year, but this whole not wanting any more kids thing has always turned them off. Any ideas?