Hi Hazel, Have been thinking about you lately in this ridiculous heat. Hope you're coping...
As for the raspberry leaf tea, I can't help you with the German/Swiss version but I certainly would recommend it. Have yu taken it before? I didn't take it for bringing on labour but for making the uterus more effective during the birth. I took it at the end of all three of my pregnancies and it did the trick in that respect every time! In fact my last midwive even commented on what an effective uterus I had when it was contracting back to size so quickly after the birth!

Obviously I've got no idea whether my labours would have been equally as quick if I hadn't taken it but I wouldn't risk it!!
I took it in tablet form rather than as tea (mostly because I don't like tea!) so maybe you can find it like that. My inlaws are coming over on Saturday so if you don't manage to track any down I can always ask them to bring you some over. Good luck in your search (and the birth!) xx