spawning grate question

[Charter <charter@charter-terminal.com>]

So I'm thinking about trying my hand at breeding tetras (my Moenkhausia
sanctaefilomenae, known commonly as either Monk or Redeye tetra, are
looking fat and sassy these days).  Extensive research has turned up some
excellent information and suggestions, but I'm at a loss as to the
"plastic grate" one should put on the bottom of the tank to prevent the
spawners from eating the spawnees.

Does anyone have any suggestions as to what I could use for this
purpose?  I've looked many places for a suitable plastic grate, but none
have yet presented themselves.  The closest thing I've found is that
plastic tank divider with the little tiny holes, and THAT doesn't look
like it'll do...

Thanks!

- Erika