The leather was only getting worse, so I found
these covers (DashDesigns Tweed Brown K060060TBN) for ~$124 plus $12sh & tax that are more-similar to the original upholstery IRL than they look in this pic. They're fitted better than I expected, but to get the bottom sections really tight, it was necessary to unbolt the chairs.
UPDATE: Approaching 3 years later, they're still tight, comfortable, clean, and fitted; without any adjustments.
![seatcovers.jpg The leather was only getting worse, so I found [url=https://www.rockauto.com/en/parts/dash designs,K060060T,seat cover,1316]these covers (DashDesigns Tweed Brown K060060TBN)[/url] for ~$124 plus $12sh & tax that are more-similar to the original upholstery IRL than they look in this pic. They're fitted better than I expected, but to get the bottom sections really tight, it was necessary to unbolt the chairs.
UPDATE: Approaching 3 years later, they're still tight, comfortable, clean, and fitted; without any adjustments.](https://www.supermotors.net/getfile/1163602/fullsize/seatcovers.jpg)