It could be woven in the weathered/reproduction as a custom weave. Contact me for details, if interested.

Reproduction and weathered refer to the same general color palette. It was introduced first as reproduction by D. C. Dalgliesh, who had the term trademarked. So other mills, including Lochcarron and House of Edgar, call the same color scheme "weathered." Apart from the minor color variations one expects from mill to mill, the two are equivalent.

Muted is a different color palette, closer to the so-called "ancient" colors than to the reproduction/weathered scheme, though darker than the ancient. It's used mostly by House of Edgar -- but HoE does offer some weathered tartans, as well.

Here's a mock-up of what the Chattan tartan in the reproduction colors might look like (although as it will be a custom weave, it is possible to tweak it for personal preferences).