Camshaft position sensor bolts part # or equivalent needed

I managed to drop a bolt changing the sensor.

It went into the main bay away from the cambelt area luckily but cannot find it....I pinched another bolt in the bay to fit it for now, but does anyone know the part number or equivalent or part?  33 in the picture.

Cheers

Edited 20 March, 20188 yr by Liverpool-Lad