Engine bay bolts

I appear to have lost 3 of the 4 bolts that secure the rear part of the engine bay (sorry about the non technical term) on a 69 lowlight.

Could someone tell me what these bolts are or more importantly where i can find them?

If you still have 1 bolt take it to a bolt supplier and buy another 3 matching bolts with nylon nuts.

will give it a shot, thanks mate.