Unfortunately we do not have a Zip Adapter for your particular zip.
We do however have a "DIY" adapter option. The "DIY" zip matches the zip on the BellyFit extender. You would simply need to sew each side of the DIY zip along the inside or outside of your existing zip. A local seamstress would be able to do this without any trouble. The BellyFit would then zip onto your jacket. When you're finished using the BellyFit, you can simply unstitch each side of the zip, remove and your jacket would be back to normal.
You can find the DIY zip under our Zip Adapters online.