Andjelo (sp?),
Have you tried local electronics suppliers? I have several watertight boxes (bought 2ndhand at HAM-fests, but new). I do remember seeing them at my local electronics supplier. Have also looked for them at building supply stores (DIY/home improvement stores, but no luck (or the prices were way too high, don't remember).
Can you order from Conrad in Germany (www.conrad.de)? I'm pretty sure they have what you need.
You could also check swimming pool suppliers or boating suppliers. Remember having seen them there too (at even more outrageous prices though).
Good luck on your quest (liked the laminating machine, BTW! Looking forward to updates).
Peter,
The Netherlands.