Over here I've not seen a half plastic filter in a GRiSO, not that I can remember anyway. Thing is though it may of varied from market to market or year to year, I really don't know. Also, in Oz ethanol is easily avoided and it's the ethanol that reportedly causes the filters to fail I believe.
I'd see if you can find someone with a borescope, run the fuel down and have a peer through the filler. It should be easy enough to identify what filter you have.
I recently replaced mine when I changed the bodywork. First time I've changed the fuel filter in 140,000 km.......