Squat thrusts with large triangular weights is your best bet but since most places don't have triangular weights anymore.... lol

You could just change one of them to a front squat and start really light to learn the form. This will get some practice for front squats and reduce the weight on one day. Or really, any other variation of a lower movement would be fine. Maybe some single leg work or lunges, split squats etc.

I wouldn't reccomend power cleans or snatches without a proper lifting pad. Shit happens.

IW