Stephen,
This is my first post here after being a long time lurker and I believe that the reason why it took a while for someone to respond was because of the 4"x4" suspended fence post comment in your post.
I must admit that my first thought was and swiftly moved on as I've read similar claims on JSA forums where the guys were told to 'get out of town' in no uncertain terms.
However,that's completely off topic and I'm afraid that I've no idea as to what blade this is although I've seen similar for sale in various Ports in S.E.Asia over 40 years ago which,IIRC cost less than $5.US or the equivalent to 2 bottles of duty free Scotch at that time but never one with the koshirae/fittings removed,I can only agree with what's been said above and SFI may well be your best option.
No offence is meant and I sincerely hope that you or anyone else take any.