Try a search of the forum. This is a common problem, hence a frequent topic.
I recall posts on various DIY repair attempts, from foam injection to plywood replacement and a few others in between.
I think the best bet is to have an upholstery pro re-do them. This will still cost you about $100 per, but the results are said to be superior to cheesy aftermarket replacements.
I recall posts on various DIY repair attempts, from foam injection to plywood replacement and a few others in between.
I think the best bet is to have an upholstery pro re-do them. This will still cost you about $100 per, but the results are said to be superior to cheesy aftermarket replacements.