Have some Front Rank Bosniaks, which look more like Uhlans ( in picture below on the left) and Irregular Miniatures Uhlans (in picture below on the right)
Irregular Miniatures 25mm(~28mm) range. Item -SYWP19 -- Uhlan/Bosniak Lancer Cavalry. The pennon is cast on the lance. Riders are nice but horses are a bit on the small side which is why I put them on Front Rank horses (I used S1/LT2A Walking, head up ).
Some others that I know of, best to look at the relevant websites:
Crusader Miniatures(http://www.crusaderminiatures.com/) items:
SYP120 - Bosniak Lancers - Late uniform (3 figs pack)
SYP121 - Bosniak Lancers Command - Late uniform (3 figs pack)
Wargames Foundry (http://www.wargamesfoundry.com/) items: