Are you trying to get the direct replacement for the AT from GAL: https://www.gal.com/wp-content/uploads/2023/08/GAL-MONXT-OMNI-Telescopic-Linear-Operator.pdf
This is brand new model designed specifically to directly replace the AT operator. In my opinion, this would be the best product. Because this product was just recently released, longer lead times may be possible.

What's nice about the Wittur product SGV/AMD is that if you have a 6040 lock, you can upgrade the clutch to an interlock clutch and get rid of the rusty sheet metal between floors.