The SIO2PC has been around for over 15 years has expanded to include a USB version and a Dual SIO version, none of these come with a case. I have designed cases to fit all the different boards and close with two M3x12 screws.
Someone on Facebook asked me to make these cases and was brave enough to send me the boards to model. They requested XE styling so that is what I made. Later I was asked to make the dual style case as well and was sent a board to work from.
Atarimax has started using some remanufactured SIO connectors on its boards and these are of variable quality, making the connector position somewhat variable, a small change was required to accomodate this.