Personally I prefer no to cut the stock bumper n instead do a full replacement. My searches came back empty got the full replacement bumpers so I got excited when I saw yours. Do u know of other companies that do full replacements?
Cutting the bumper is not a big deal. Don’t over think it. The reason that you aren’t finding no cut options is because they compromise the main benefit of a bumper which is clearance.
Dobinson is the only one I know of and it’s so compromised—it has worse departure angle.