Here are some useful links for Napoleonics.
First of all Adler itself for the figures:
Next, some superbly painted figures by my friend Richard, with basing by me:
For flags I print all my own flags on paper and then glue on to pins rather than the Adler flag poles - this is partly because pins are stiffer but also because I like to use oversize flags to give a good effect. I get the picture files from this site and then insert them into Word to scale to the size I want: