new seat
#2
Seats
Yes they are, however, could be quite expensive from the dealer. They shouldn't be too hard to replace if you do it yourself. Just take your time. You might have to remove the seat from the Expy. Would be easier. Also, you might want to check an upholstery shop that does automotive seats. They might be able to make or fix yours by replacing the torn panel. Either way, it's going to cost a few bucks.
#3
Yes they are. I've changed the seat foam and to do that had to take the covers off (obviously). Check ebay, lots of aftermarket covers available there that look just like the originals. The cover comes off with the seat in place.