Just a osVAC adapter for https://www.thingiverse.com/thing:4522208. Should also be customizable. Please download the f3d file and create your model with the matching size/parameters.
Check out our Youtube-Channel for more DIY and osVAC content: https://www.youtube.com/channel/UCbcvFQhqHyO9aZZF3MCQN3Q