Need help finding magnets for experiment...

I need some help in locating ceramic disc magnets that measure 120mm in
diameter with no hole in the center.  The thickness can be as much as 13
mm
25.4mm.

The strrength is not as im****tant as the dimensions and that it be a solid
disc (no hole in center).

I have found neo magnets that are up to 8" in diameter, but their strength
will actually make it more difficult to perform the initial experiment.

If anyone knows where I may purchase ceramic desci magnets that are at
least
120mm in diameter and up to 25.4mm in thickness, with no holes in them,
please let me know.

Thank you for your help.

(I have Googled, Ask'd, Yahoo'd, etc. - all to no avail.  The magnets that
I
have found generally top out at 76mm in diameter.  If I have missed
something in these searches, I would appreciate someone pointing it out.)

jim