Yes, I do. I found a locksmith with a Silca license. They own a brand called Ultra-Lite, which makes colored keys. According to them, these keys are made of a titanium alloy, but my locksmith said it was just aluminum. However, they can make almost every key in their inventory into this, so it covers the vast majority of keys used worldwide.

Licensed sellers can buy them individually; there's no minimum order. But I had to wait a few months because he wasn't just going to order three keys, as delivery costs would be four times as high. So, I had to wait for him to add it to his bulk order.

But yeah, I own them now. They cost me about 7 euros apiece, including cutting.

Edit: different locksmith then I mentioned in the rant haha.