Forstner are a stand up company, the JB Champ reissue was very good. Regarding the flat link though, solid end links are a bit of an issue since the fitment is slightly different for the multitude of 19 and 20mm models over the past 70 years. What fits the Trilogy doesn't usually fit the FOIS for instance.
Out of interest, what were your issues with the Uncle Seiko offerings. While I find them rattly and light, I think they are pretty good and a viable alternative to the 4 figure originals. Even the US offerings don't fit perfectly straight out the box so I fear for the solid end link versions from Forstner.