Back in March I took down an AG pool and moved it. 2 of the seat covers were cracked. I looked around on line and found them at this site
POOL1.com or Swimming Pool Wholesale Warehouse features Above Ground and Inground Swimming Pools, heaters, safety covers, pumps, motors, and filters
I ordered them this past Sunday. I got a confirmation email Sunday, then an email on July 4 from a human explaining that the order would be sent to their secondary warehouse because it was an order for an unusual part that they don't normally stock at the main warehouse and it would take 2 or 3 days to ship. This was ok, I'm not in a huge hurry. I got a shipping confirmation this afternoon. So, I'm happy. Good communication explaining a delay, then they beat the estimated time. The price was reasonable too, about half what I expected to pay.