I've seen kimberwicks with french links but they're a bit few and far between. Try bitbank maybe or if your heading to badminton soon.....theres nothing you can't find in those trade stalls
The other option is to try a Myler Kimblewick, low port. We are into the second week with this bit and so far i am really pleased with it and my pony seems very happy and comfortable in it.
I have a fun ride on Sunday which put it through the last test, but so far i am really pleased. Hacked out alone, in company and had a jumping lesson in it. I am now considering to buying a dressage legal myler for dressage and schooling as he appears that comfortable.
Just read ann-jen reply, i think we are talking about the same bit.