Since you kinda need those bolts for your shocks NOW, I would definitely go to the dealership and get some.
Otherwise you can check out places like
BikeBolts.
This mysterious plastic piece that ended up in your ignition is very intriguing. Do you have a picture of it? I am also curious on how exactly it got in there. Maybe someone is messing with your motorcycle? The reason I say that is because I just don't see it getting there by its self, especially under normal operation.
I am glad that you were able to spot what could have been a serious problem. This is why I always use T-CLOCS before and after I ride.