If it's a dovetail, then you can definitely just do it yourself. I’ve tried swapping a few sets on 1911s using a padded vise and a brass punch, and I never had any problems.
Sights can be directional- remove left to right and install right to left. Do NOT use a steel punch and look at the underside of the slide where the sight is mounted to make sure they did not use a set screw to put pressure on the dovetail or screw into the base of the sight.