Be very careful about Certo 6 if you have read about him in Rangefinderforum. Below are some information which may be of interest to you.
1. Camerabellows of Birmingham can make bellows for the Super for GBP25 each without you sending in the old bellows.
2. Richard T. Ritter can get replacement bellows for US$85. CLA would be an additional US$50-90.
www.lg4mat.net/index.html
3. Newton Ellis of Liverpool, UK can do a CLA, including bellows replacement, for about GBP85 +VAT and P&P (price dependent upon what price they can get the bellows for).
www.newtonellis.co.uk
Hope this helps.
I have replaced the bellows of my Super and it is a fantastic camera. A little bit on the heavy side. But the lens is just so good. Beat my Super Ikontas by quite a margin. And the rangefinder is so smooth. Good luck.