I had this custom made by an Esty vendor.

It fits well EXCEPT that Tara insists on putting both of her front legs out the neck hole. Her legs fit into the sleeves, but she pulls her front legs up until she can free them via the turtleneck. Because I'm afraid she'll trip and hurt herself, I let her wear it around the kitchen in "off the shoulder" mode. That she didn't mind.

Since this sweater for Tara fits Bailey, it looks like Bailey now has a new sweater. She keeps her legs properly in the sleeves.