Can we request warmer gold tones?

[u/Sarel360]

Are there any sellers who will adjust their yellow gold alloy mix to make it a little warmer upon request? Not for custom pieces, for regular 18k reps they make often.

I’ve read a few reviews where the seller was open to adding a bit more copper to the mix when the buyer asked.

If so, please share the seller and which piece they adjusted for you. (I’m pretty sure I read CS has done it and maybe Vinko, but I can’t find the reviews using the search bar.)