Just wanted to share a really excellent flag sheet, that i've just purchased on ebay. They are good quality prints on a cloth-type A4 paper and are print-outs of handpainted orginals, which cover many of the key cantons for the Swiss Confederacy for the Burgundian (and Swabian) wars. This is the picture from the ebay item.
The seller on ebay is sasha_4sale. He also has several sheets for the early 16th century, including Spanish, French and Venetians if I remember correctly and appears to be extending the range. Sheets can be purchased sized for 15mm figures too. This one cost me £12.50 inc postage for 10 flags - seems a good deal to me and I'd recommend having a look on e-bay.