I could not find a mount for the 4th Gen Scarlett Solo, so I made one. This is mounted to the underside of my desk with screws, but you might be able to get away with double sided tape. All bottom corners have a filet which hold the device securely in place to allow plugging and unplugging cables without the device falling out. You could probably get away printing at 99% scale for a super snug fit, but there is minimal play when the device is secured as-is. The only downside to this mount is that you cannot remove the device once mounted without unscrewing the mount.