Have you tried the premium MOP buttons (cream coloured) or the smoked MOP buttons? The thin ones of which are even free of charge.
Warning: Spoiler! (Click to show)
This was a trial shirt Luxire made me. If I had it done again, and I plan on doing so once this bloody winter ends, I'd request an unfused collar. This one was fused and the fusing shrinks differently than the polyamide resulting in a slight moiré pattern on collars and a permanent crease on the cuffs:
The fabric itself is fantastic, I've worn it both with and without an undershirt, it's reasonably opaque. It breathes well and so far I was always able to get sunscreen and grime out of collars and cuffs even after 6 hour sessions of supposedly 'fun' on the golf course.
Any chance you could post a link to the cloth?
I don't believe it's on their page I've communicated this project via Email. I requested a 100% synthetic fiber fabric for sport polo shirts similar to Nike DriFit and Luxire offered to source it from Carvico, Italy.
I'm sure if you contact them with this information, they'll be able to give you more details/make an offer.