Silencer help please

[Bauer USP]

Hi everyone

I have a Maruzen PPK and for the life of me can't find the silencer for sale.

Could anyone advise a silencer / silencer adapter or someway of putting together a silencer for it?

It has an internal threaded barrel (I don't know what size) so the silencer would require an external thread if that makes sense.

Any help would really be welcome.

Many thanks