jsea, since we believe you are on the Venture in 3 days, this may not help much.
We have ordered parkas for our September 4 Venture cruise. The Roll Call for this cruise has ordering information in posts 10 and 16, as well as packing lists. Since you can exchange jackets on board, they should be available without preordering. Boots are provided on board without preselecting sizes. (As Mr. Luxury has noted, bring lots of socks since all the boots are size 13! 🤥)
Remember your waterproof pants for zodiac landings, and please post from your cruise.