aleksandar.
There is a person named Tuinkabouter who lives in Europe. She has a seed sight. I don't know about the large quantity but you could inquire.
Her site is in Dutch and English and uses the botanical names; she has Cucumis metuliferus listed.
http://www.freewebs.com/beleve...
I can send an inquiry to another grower who lives in Europe and ask about quantity. I'll let you know if and when they reply.
If all you need is some starter seeds I could mail some to you; I grow these in my garden and have 100-150 seeds left to share. If you grow these out and save seeds you will have plenty for next year.
May I ask what country or area you are in?