>>513878193
>these high-res images are forever lost unfortunately
I'm almost nervous about sharing this since they might fix it, but the images should still be archived on mutualart:
https://www.mutualart.com/AuctionHouse/Dorotheum--Vienna/F16A8ECE57A51F18/Auctions

Mutualart will limit you to a 1920px webp if you make the request with a browser, but if you make a curl request to the image address it should give you the original resolution. It helps to have a free mutualart account since they will force you to login after a few minutes.