24-well petridish, again.

[Yamagat]

Sorry, I am asking about 6-well or 24-well clusters that are NOT treated
for tissue cultures.  
We can't use either negatively-charged (so-called tissue culture dishes) or
positively-charged (eg. Primaria).  I know 35mm and 60mm petri dishes and
96-well petri clusters are available from many companies. But, does anyone
know of clusters like these?
000      000000
000      000000
            000000
            000000, but NOT tissue-culture plates.