you could use a mason blade on the chop saw, another thought is a tile table saw. you can get something worth taking home just over 100 bucks and it allows you to freehand the shape cut you want. also will be useful in the future since we all seem to have projects come up over the years
that's because there's no 'grain' to brick, genius trying to achieve pro results using amateur tools tells me all i need to know,,, quit being a cheapskate - get the right tools & do it right OR hire it out,,, if you don't, the satisfaction of saving $$$ will be erased permanently by having to look at shoddy results in yrs to come.
its YOUR home, fergawdsake,,, unless you've got a bus in the front yard w/18wheeler tires for planters, don't you want the place to look good
ps - when our demo saw's busy & we need another, we pay about that rate, too - full day's $125 INCLUDING blade wear & we cut dry !