Vinyl Liner Rod and Clips?

Hello.

Even though I have had my pool for 8 years, I still consider myself a novice as I haven't had to deal with any issues (until now). The liner is 8 years old and the pool walls are concrete with concrete steps. The liner is kept in contact with the steps with rods and clips. Unfortunately, a few of the clips have corroded (in the corners) and the liner is pulling away making it difficult to get it back in the liner track. Does that make sense?

The clips were drilled/glued/cemented into the concrete wall. Can these be replaced? Is a DIY job? Where do you buy them? I've spent the morning searching with no luck.

Thanks!