WITHDRAWN - WTB - Mossberg 464 hammer extension

[pasound]

The 464's hammer is threaded for a knurled extension, can be mounted right or left in the hammer.
I am not looking for a clamp-on extension, just the factory thread-in original.
I do not know a Mossberg part number. It's just listed as part #67 on the parts diagram in the manual.

Thanks!