Good source for write-protect/enable tabs

[Chuck Guzis]

I used to have a big stockpile of write enable/protect stickon tabs for
diskettes but it's gradually getting whittled down to a precious few dozen.

Does anyone have any suggestions on where more can be obtained?  Note that
these have to be the removable opaque BLACK tabs.  (I've got a bunch of 3M
clear red tabs that don't work at all on some drives.)

Cheers,
Chuck