My ABN has lapsed and personal circumstances have changed so unfortunately, probably not. It's a shame because I have way to many parts here in my garage.
If you want to give soldering a go or know someone who can do it for you think you may need to swap the esp8266 board on your device 1 just make sure to wire it up the same. If the computer can't see it you can't update it unfortunately. The are about $7 -10 AUD from ali express, I would send you one but it would cost $25 shipping.
Do you have all the parts to make the units? If you have the complete hardware setup then it might be worth it to find someone who can do the assembly.
You know it's a working / sellable item so you could probably find someone to take care of the rest and just grab a % of the sales.
Just a thought.
-Dave