I don't know if you have the same chains of shops that we do in the UK, but if you do then a visit to the UK forum might be an idea. There is a 'sticky' called low carb foods in British supermarkets which might help.

I make shakes which are not too bad:
Unsweetened soya milk.
Scoop soya protein isolate.
Good dash of sugar free strawberry squash from the co-op.

There are two online shops in the UK that can send you low carb goodies. One is carblife.co.uk. - I can't remember the other. If you go to google.co.uk you'll come up with both of them.

Good luck.