Update on my situation:
I opened a PayPal dispute after Chris wasn't much help resolving my problems, and they have requested that I send the frame back to China, at my expense. I looked up how much it would cost, and the cheapest option with tracking from Canada to China is over 500 CAD! More than half the original cost...

Does anyone know if there are any third party sources for the seatpost hardware? Chris denies that there is anything wrong with the one I received but I have no doubts they sent the wrong parts. If I can fix the seatpost, I can at least use it as an indoor trainer bike.

And they still haven't refunded me for the missing bottle cages (the least of my worries at this point).

I tried to order early 2020 before the pandemic, I paid with paypal and expected delivery. They answered emails very bad, but at least I received a reply. After I had paid they disappeared and 3 months without a frame I had to use Paypal resolution center to receive a refund...

But they are probably not any worse than any other chinese company. Very much hit and/or miss with everything.

I was looking at the Miracles not long ago...they're still on my list for my next frame purchase, but tbh Seka is looking quite nice and may just convince me to stick to disc brakes...

I've always liked the Yoeleo R12 and I'm passively in the market for a new frame so I reached out to Miracle Cycling for pricing on their CR01, which is the rim brake equivalent of the R12. While I was at it, I also asked about the CR016/CR025-SL V climbing frame.
Perhaps there was some miscommunication or language barrier as they gave me the price for the CR06 instead of the CR01, but I can only assume the price is similar enough.

Here's what I was quoted as of 8/11/22:
CR016-SL V: $549 USD - I was specifically given the price of the disc version and not the rim version I requested, so perhaps they no longer offer rim brake?
CR06-V: $519 USD

Both include seatpost/headset/handlebar. $185 for shipping, $255 if you buy 2.