how i have a 98 civic ex, i want to know what is a good tower strut bar?

also i want to know how do you install a si strut bar on an ex that has no holes for the bar, i know i need to drill the holes to it, but how do i lock it in place, i know for the si, the bolts are harness right into the body, what do i need to do to have most support?

thx!!