Been there done that.
Exactly same insert. Found one at Daniels that should crimp ok (because HX-3 pliers already in place), but both sides declined to commit.
Suhner just repeated their sales mantra 'we recommend that you use...' and the DMC sales rep said that he also thinks that it would work out, but that it must be tried and blah blah blah...
Changed the connector to a prefab assembly, so not my problem anymore.