I guess I never really appreciated how hard it can be to get a poly thing going especially for a lesbian couple. The entire poly thing just sort of happened for my wife and I, and I thank my lucky stars for that, because we both love it. Our other relationships are very fulfilling, our relationship together is stronger because of those, and it's a great emotional support system for everyone involved. I've never been happier.
I can however relate on one level. It was damn near impossible for me to find lesbian or bisexual girls before I met my partner, especially when I compare it to how easy it was for me to get guys.
So, in any case, hang in there. I'm sure you'll find a woman (or women) who you can both love if you keep looking.
I'm a 26 year old bisexual woman married to a 31 year old bisexual woman and we have a live in boyfriend and three girlfriends.