actually, i got three of those clip on lens sets at photokina by charming around with sales staff at a chinese companys booth
They are quite cool but not very "sturdy". I guess it is the typical 9.99$ range ebay item.
I will keep one and still have another one to offer for the november competition!

@juiceme, damn sorry.
I somehow did not copy everything from the editor i prepared the post in... corrected the post