I too had trouble finding minis for this period. You could use the Perry agincourt figures, but not all of them. Avoid the 'white armour' ones and faulds (lames, the groin armour) and go for pig faced bascinets.
Some of the Kingmaker 100 years war figures might work, haven't seen them all but from what i've seen some would be usable.
Foundry do some medievals, but earlier 14th century, perhaps useful for the lower men at arms.
Claymore castings are for that sort of era i believe, you could have a look at those.
I might remember some other figure ranges so i'll comment if they come back to me.