Help with bonnet catch needed

I just got a standard grille to replace the bling one that was on the car when I bought it. It went on fine, with all the clips and slides fitting perfectly, and the bonnet catch fitting thru the guide in the grille, job done, I shut the bonnet..... ....and tried to open it, and the bonnet catch came out....HELP!!! How do I open the bonnet if the pull bit of the catch has fallen out.... Thanks for your help in advance. J

about bonnet catch 

hi has it fell off completely or has it just fell behind the grill

Completely....alas 

the bit with whole that is attached to the catch is there, but the metal pull bit has come off....so left with a small pull ring visible thru the side of the open bonnet

would it be possible to make a long but small hook out of a metal coat hanger guide it through the grill whilst looking through the side of the bonnet, hook onto the ring and try to pull it to release the bonnet.