if i were you i would wait until you have the money for st200 bumper. Although you could cut new hole on the ogther side it wont look the same. Its not perfect circle AND if you look there is an inner lip inside, you wont get that after you cut it, you will need to fibre glass etc to get the same look, sand it , spray it etc and make sure it blends in. After you cut a hole out you will have a WHITE ring on the edge of the new circle.
just giving you the heads up incase you do it yourself and make a mistake. We learn from experience but its a cosmetic experience that could look out of place. ;-)