The updated MDP-P906 seems to now be available on AliExpress for $160 - $173 USD. USB-C PD, 30V 10A 300W (up to 14A input ?!), a bit thicker with a fan. I was shopping around about a month ago, and found the MDP-P906 manual had recently been published by Miniware, but couldn't find it for sale anywhere, so I ordered an MDP-P905 (with shipping and NY taxes $123), it should be quite sufficient for my needs.
Even though I had already read about it in this thread ... when I was first trying out the MDP-P905, I powered it up with a 19V barrel jack laptop charger, looked through the menus, unplugged it then connected it to my laptop with a usb-c to usb-a cable ... and the laptop zapped right off from having 19v injected into its 5v usb port. Luckily the laptop was fine after a power cycle. Measuring with a multimeter, the charge in the input capacitors can remain for a surprisingly long time.
In addition to my 19V 65W barrel plug laptop power adapter, I have an 87W USB-C Macbook charger, so I got a little USB-C 20V PD trigger to barrel plug dongle for $11 on Amazon. Given I was already aware of the handful of hardware design issues with the MDP-P905: (no USB-C PD not even 5V, need to ensure discharged before connecting to PC, non-standard banana jack spacing), and my primary constraint these days is space/size, I'm happy with this thing.