I have a surplus of seeds for A.humilis and A.shawii.
The humilis seed came from a member here and germinated freely for me. The A.shawii seeds are self collected and a trial sowing gave me nigh on 100% germination.
Not really after anything in exchange, but if there are any seed for the less common Tricyrtis species, Mediterranean Digitalis, Salvia or Lobelia (especially L.laxiflora) I would be interested.
PM me if you're interested.