This version is not really my thing, but it's an idea to expand upon.
Reconstructing a Viking Hanging Dress from Haithabu - site has diagrams of the extant pieces, construction details and references
Hibernaatiopesäke: viking kaftan
Iron Age Finnish Clothing -- Elina modeled this outfit in an Iron Age fashion show organized by a friend. As a note: Many of Elina's posts are in English as well as Finnish, and she does beautiful needlework.
Men's Hiberno-Norse ( Irish Viking ) Tunic
Men's HibernoNorse Irish Viking Tunic by HeddlesandTreadles, $80.00
Fine and simple woolen gown with 4 gores
Merry Swan at Pukkisaari Feb 2016 14th Century living history in terrible weather – Neulakko
Fit for a queen: viking kaftan and a hood for Queen of Drachenwald.