I finally decided to do Starting Strength only to find the rack at my gym is busted.

Hopefully it'll be repaired soon but what can I do in the meantime? There are three different leg press machines but when I tried them out two of them are hell on my knees and the third just doesn't feel the same.

Edit - I should've mention I've been lifting for awhile even though I'm just now starting SS. My squat is currently at 235lb and I'm trying to get it up to 300lb.