Rather than try and link 4 years of internet searches, I’m going to give you a few of the highlights. These are the sources I return to again and again.
Hurstwic has been a great source of information. Trews, tunics, hats and lots of additional clothing information. The whole site is well worth a look.
Men’s trousers. This site is another treasure trove.
Trim This is the article I read that talked about silks.
Measurements. They are always tricky. This site has the most comprehensive list/chart.
I use a Finnish version of the undertunic. Once again, the best site is here. The pattern is very simple and very adaptable.
This site has a broad range of information.