Bent rims can be repaired so long as the damage isn't severe. However, were it my car, I'd replace with a good second hand one, if only so that I didn't have 3 wheels showing 11 years of use and one in mint condition. Failing that, I'd have to buy 2 for the same axle and refurb the other 2 to mint condition, keeping the other good one for a full sized spare. My advice - if you are unsure of the safety of the wheel, replace it