67-68-69 Barracuda chrome n stainless trim - how hard to find?

Most of what you interested are available from people on this site. Many will reply. Front and back SS trim seems to go from $60 to $300. The front is a available as a repo.

Repo wood grained instrument cluster costs about $540, not sure about the quality. Many will sell it used but they want almost as much. The 150 speedo and original 0-6000 tach come up now and then. Check this site and eBay. The "0" position on the 68 tach is different than the 67, so get the correct one.

My main advice is be willing to wait, and you will get a better price.