Which seat bottoms are compatible with the AL7 on the driver'* side? I'm noticing one of my leather cracks just started turning into a tear.

I want to say that the seat bottoms are the same as the non-AL7s with the exception of the cutout for the power switches on the bottom. I was told that the left-right seat bottoms wouldn't work either BUT the only difference in the left and right bottoms is the strap for the seatbelt buckle, which I can live without.

The only huge difference between the 2 trims is the upper seatback, for all the lumbar and wing adjustments. IMO, the other smaller differences are mute in comparison to having an all new interior stitched up.

all non-al7 will have cutouts, whether they are power or manual (for the recline lever at minimum) so only AL7 covers will give you an exact match.

Will a Passenger side bottom work?

The seatbelt loop/strap would be on the wrong side if you got a passenger side one.

passenger AL7 will work like bill said, all others will have the issues I mentioned.