Hey ! There are other Zeiss lovers out here
I bought my 4th Zeiss today (CZ 35-70) and I'd say that this could be an option for you. Whilst not a macro lens it focuses down to 25cm and Zeiss claim it is as sharp at any of it's focal lengths as any equivalent Zeiss prime. Great value for money (around US$400).
Other options are :
60 2.8 C macro This is the newer, smaller design.. Magnification 1:2. Very sharp. About half the size of the .......
60 2.8 macro This is the older version. Magnification 1:1. Incredibly sharp.
100 2.8 macro : similar performance to the 60 2.8 macro and a magnification ratio of 1:1. Very sharp and heavy.
You could also consider the incredible bargain of the 'cheap' (for a Leica) Leica R 60/2.8