Walther 380 extensions on P380 CW380 mags?

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hello all, had a thought and popped in to see is someone knows the answer.

just wondering if anyone has tried to fit a grip extension from a Walther 380 mag onto their Kahr 380 mag?
I have had both of my pierce extensions crack on me at the lip and would like some other options....
I have seen some Walther/clone extension floor plates in stainless in the past, and that would be really nice.

so if anyone has a Walther 380 mag and a Kahr 380 mag could you try to swap floor plates?
even if it needs a tiny bit of dremmel work it is worth it if i can get a steel or aluminum extension on there :D

thanks fellas!