Crank Bolt Quandry

I currently have Shimano Tiagra Triple crank and square tapered bottom
bracket.

I just purchased a Cannondale crank (Sugino) for use with Octalink
bottom
bracket. If I buy an Octalink bottom bracket, most come without crank
bolts.

What crank bolts would be compatible with my new setup and where can I
find
them?

Would the old crank bolts/dust caps be compatible with the new setup?

Thanks,

Kerry