MX Lock Switches available at TheVanKeyboards
MX Lock switches are a toggle switch. You press once to lock them on and press again to release them. It seems this switch is discontinued but there are a few surplus stores that have a few left. I've already purchased a handful from one such surplus store. I should have the switches in a couple days.
I'm planning to use them on my gaming toggle key on my MiniVan keyboards. If you are interested in purchasing a few for your boards or just to have, you can find them on my site here https://thevankeyboards.com/products/cherry-mx-lock-switch-mx1a31nn