Civic EG

trying to instal some ep3 seats on my sedan but cant find the right way of doing it. If i put 3 bolts is crooked and is not level as one side sits higher than the other one. I understand these particular seats sit hit on the eg but my concern is to find a way of installing them adequately.

weld up some brackets to the current rails, or get some aftermarket rails.

Thanks I'll try taking a look at how to fabricate some brackets that will fit on the hole of the bolts then weld them.