You're welcome, Burgers Zoo and Apenheul were my home zoos when I lived in the Netherlands, so if you want any info just ask.
It also seems that my next visit to Ethiopia will be postponed by about a week, so I will probably be in Switzerland and could meet you in Basel (though I would prefer a weekend day if possible....)
Certainly - I will be in Basel from the 21st to the 25th of July before heading to Walsrode. I intended to visit Basel zoo on the 22nd and Mulhouse on another day, but perhaps we could meet on Sunday the 24th? I will be getting a UK sim card when I am in London so I don't know my phone number yet. If you are on Facebook, my id is Glenn Aubrey and it would be easier to keep in touch.