Corey Feldman's Playmate Ex-Wife: I WANT CHILD SUPPORT!

Corey Feldman's Playboy model ex-wife claims her famous baby daddy left her high and dry with their 7-year-old son -- and now she's enlisted county officials to force him to pay child support.

Susannah Feldman's local child support agency filed legal docs on her behalf in L.A. County Superior Court -- asking a judge to order Corey to cough up $307 a month to help take care of the kid.

The figure is based on Corey's monthly income -- which, according to the docs, is only $1,387.

Susannah -- who divorced him in 2009 -- also wants Corey to provide health insurance for the child, and pay half of his medical expenses.