ka24de upper timing cover bolt sizes?

[mattrobertsxn]

as you can see i am missing two bolts that go from the upper timing cover to the lower. i do not know what happend to the bolts that were there, i just rebuilt my motor, and am piecing it together. does anyone have an idea on where i can get the right bolts for this? i cant find any of the right bolt sizes at the hardware store. i can imagine these bolts are important considering the head gasket is in between them
please help me if you can


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