No I don't but why don't you just start one on FB? Or you can just search FB or MN can't you?
This isn't meant to sound sharp in anyway but for me personally your title would put me off. I think it's the 'mummy's' bit. I find it a bit, well, twee I suppose. I am a SAHM (but trying to get back to work hence why I am here). For me, the tweeness of 'mummy's' rather than 'parent' makes me think of floating about my clean and tidy house with my perfect children gurgling at me, having coffee mornings with my perfectly well turned out NCT friends and not worrying my fluffy little brain with trivialities such as politics, the news or anything I would be interested in. I am sure not all would agree with me but that was immediate reaction when I saw your thread title.