Can you post a picture of your DIN fitting?
The older and vast majority of the Phoenix uses the same yoke threads as a Conshelf and there are several different yoke options you can use.
The most recent/ newer Phoenix uses a Metric yoke thread that is compatible with the Mares yokes and many several other new regulators.
If we can see a picture, we can tell which one you have.
If you are not interested on keeping the DIN fitting, it is very possible that someone would swap with you.
In either case, VDH can also locate anew yoke for you, but he may not have them in stock at the moment.
Buceador con escafandra autónoma clásica.