Which pool liner should I use?

I bought an above ground pool on craigslist and the liner configuration is different than anything I can find. The liner goes into a slot on the upper rail all the way around the pool. With white rubber clips holding it in place. Anyone know what liner should be used? I have pics to post if possible. My friend has the same pool but couldn't remember what liner he used.

You can use Flickr, Picasa, PhotoBucket, etc. and use this button to link them into this thread. http://www.poolforum.com/pf2/images/...nsertimage.png

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