I can't help you with this one I'm afraid. There was a woman called pure passion who work as a female male couple only. Now she was an awesome squirter. She even squirted during anal with me but she doesn't appear to be around any more. She's the only one I have seen but would be very interested in what replies you receive on this topic as it's difficult to find a genuine squirter and it's certainly a laugh to indulge in!!!
Pure Passion was indeed amazing. A projectile squirter, she and her male partner worked in Swindon. But I understand she died recently. If I've been misinformed, I can only apologise to her and her partner. But certainly they've disappeared from the scene.
A woman who calls herself something like gushtastic and lives (I think) in Bath was very good when I saw her a few years ago. I think she's still around. Gushed buckets, she did.
And if you're prepared to travel to south Wales, there's Wet and Wild. I've been in touch with her but haven't seen her yet because she can only do incalls in the evenings and at weekends - which doesn't suit me. But she seems very nice, she's well reviewed on AW, does anal and everyone agrees that you need to take serious wet weather gear with you. I still hope to see her someday because I also enjoy a good gusher. Loads of fun.