Thanks for those images Steve. I find Balaam's hat less convincing a cognate than Rosanne's though; and the Hours are far too early for comparison.
I think the most Italian-looking features are the outer sleeves of the Empress and Temperance. Robert and I had a go at this a while ago - not so good as the current go! - and found that the Charles VI "Love" card, now assigned to Florence and dated to around 1460 (so effectively contemporary with the Visconti-Sforza), shows a very good cognate in the girl at the very back of the procession of lovers. I can't find the post where we discussed this now - maybe Robert remembers.
I think our best best is to look at prints, particularly playing cards, from various places. My search for Jean de Dale (sometimes also "Jehan"), a playing-card maker from Lyon in the late 15th century, doesn't match the style (one Knight has the sleeves, but the rest of garment doesn't).
Just for the record, another set of nice pattens, although not worn with real poulaines, is this one from the Master of the Playing Cards (German), 1454, showing an Unter of Flowers.
http://www.rosscaldwell.com/images/imag ... pc1454.jpg
Scanned from Detleff Hoffmann, "The Playing Card: An Illustrated History" (Edition Leipzig, 1973), plate 30a