HELP: stuck in Chile with broken PINION lock ring

Hola or hey everybody!

In Feb 2025 started with 2 bikes (a Pinion and a Rohloff) on a South America bike trip. We departed in Ushuaia, Tierra del Fuego and made it to Concepcion, Chile. Lots of uphill, dust, mud and gravel. The PINION bike was bought used, we are the third owner and has about 10.000 km. We did NOT let it be serviced after buying. 😅🙈

Now the tragedy:
– After 1.000 km the lock ring fell off the Pinion bike and put it on again w/o a lock ring tool bc we did not have one. We used a set of other pliers.
– after 1.500 km: we put on another chain and a new PINION chainring (we were carrying) and let it tighten by two strong dudes in a bike shop.
– now after 3.500 km: the chain ring fell off again and we cannot get it screwed back on. it seems that the thread of the lock ring is worn off, so it cannot be screwed back on.
– we think that the lock ring is made of softer aluminum than the hub where it’s screwed on. ​

What to do? Do u have any tip or help?
Should we:
1) have the lock ring and other tools shipped from the EU or US to Chile?

Or / and:

2) Have the lock ring manufactured in Chile?