Hi
Lindt do a Diabetic range:
http://www.lindt.com/1610/3429/3497/3519.asp
I don't know how much you want to spend but I have been told that the 200g pralinés are nice.
I would try the shops in the listed order:
Coop City
Without "Nougat Crisp"
Manor Globus Primo / Vis-à-Vis
Without " Pralinés Sélection"
Merkur Reformhaus Müller
I don't go often to Merkur but the few times I have been I have found them very very expensive.