I was looking at a 98 gt before with the same issue, rest of the car was great, no rockers. Apparantlly they are known to go on these cars. I couldn't find any pre made ones to buy and a body shop wanted about $1000 per side to make and replace them. Depending on how bad they are and if you are up to the task, you could probably make some yourself. If you do get them fixed, oil spray them good afterwards.