Sorry in advance for a negative sounding post.
You need to suck it up. It happens to all of us, and it's called 'life'. A wanted post doesn't entitle you to it anymore than anyone else, although I do appreciate how frustrating it must be.
The MTB community here is incredibly helpful, and I've been offered an unbelievable amount of help, advice and freebies. I've help others where I can too. Perhaps you've not been involved enough to appreciate it? Apologies if I'm off the mark here, but I'm not a prolific poster either.
When you're looking for something as rare as you are, you're going to need to make exceptional effort. For a steerer that is as simple as the one you're looking for how can you not get one made up? If you wanted it enough, you'd have bought a lathe, learnt to use it and made your own. That's not a joke, I've done similar.
I took 2 minutes to find your wanted thread and read it. It smacks of someone halfheartedly searching, and TBH, mainly comes across a little negative, as does the tone of your opening post.
So to atone for my negative post, your steerer;... Why not buy a pace 1" steerer and a steerer shim to boost the bottom to match the 1&1/8 diameter of the syncros fork? you could have the parts within a week for very little £££
Peace.