Plunger Lock

I have a workbook with me and I lost the key, not records of the receipt or any other serial number. It is a Medeco lock piston. He did not come with the workbook, I just drill a hole in it and put it in is a mat that I can buy somewhere that will open most locks piston modeco?

I would call a locksmith because Medeco is one of the best locks there and be called human.
You can watch and if you think you can do good luck.

http://boingboing.net/2009/05/31/profile ...
http://www.youtube.com/watch?v=0RWNrCDM8 ...

In doing research, it does not appear that there is a master key available at retail. In these cases, the best solution without destroying your workbook is to contact the manufacturer directly or find a good locksmith. They may be able to guide you in the right direction on how this unique situation. Another option is to find a hardware store that sells them and ask them if they have a mat and if they could send someone to open the lock. Sometimes, retailers have master keys. Sorry I could not be more helpful.