Matt,
Unfortunately we do not have a STEP file for our SA-series. The closest would be the BB60C, but the SA44 is 1 inch shorter, uses a USB 2.0 type B, and has a slightly lower SMA output.
https://relatedcontentdemo.kinsta.cloud/wp-content/uploads/2024/02/5146-9941_BB60C_defeature_artwork.STEP_.zip