A prototype Dremel powered vacuum pump. Based off a 5015 radial fan originally then evolved to something more beefy, enlarged a few parts and added some nubbins. No idea if this will work as good as a commercial product, but being powered by a Dremel I think it will have plenty enough power. M3 screws to secure the housing and adapt the impellor. Screw on housing, you may need to scale up all parts 1 or 2 percent to compensate for the threads.

When using a Dremel or anything running at a high speed, use PPE. This is printed parts running past 20K RPM. Make sure your printing materials are up to the task. So far initial tests are pushing/pulling -70mmH2O. It could work better if thread tape was used to secure the top and bottom.