The cheapest way to get my 3D printable models is my Patreon page.
You'll get 5 STL:
All the pieces are keyed.
This piece comes in couple with the male version. You can also buy them both with a 15% of discount here.
For personal use and one commercial project (up to 2,000 sales or 20,000 views).
One copy to be used by a single user.
One installation by a single user.