I sold my Skunk Board prototype (#2 of 2) to an Atari collector in the UK a couple of years ago, and he was recently trying to sell it last I checked. I will try contact him and get you guys in touch if he still has it.
Also of note, it appears that pre-orders for the JagSD cart have quietly moved over to AtariAge. I have a PayPal authorisation for RetroHQ that’s been sitting for well over a year with no movement. His communication is really horrible and vague.
If you go on the AtariAge store on their main site you can put your place in line without having to pay anything upfront. I’d suggest anyone with a pending pre-order do so because what I can decipher from the AtariAge forum is that pre-orders on RetroHQ site are void at this point.