Wikes Sander vacuum adapter

My Wikes ½ sheet sander is quite old (2004). I'm not sure if it's still generally available or if it still has the same design. The adapter allows you to attach a standard hoover pipe to the sander, in place of the dust bag it comes with.

The design is intended to be printed with something flexible like TPU. If you make it with something more rigid then you may need to do a little sanding to get it to attach. If you make it rigid, you may need to stuff a small piece of something rubbery in the locating slot to help keep it attached. TPU has just the right amount of flex to allow it to be pushed on but then to hold it in place reasonably well.