I have zero experience with AWP's and near zero knowledge about them. I found multiple sources, but many have poor ratings and should probably be avoided. The only source I found with good or great ratings was Baker Creek Heirloom Seeds www.rareseeds.com. They have a very good ("Top Five") G.WD. rating. BTW, the botanical name for Australian Winter Pea is Pisum sativum v. arvense or Pisum arvense.

Tried some in a wildlife food plot some years back. Poor germination rate, anemic growth. Not worth planting, IMO.
Just an unimproved 'English pea' type gareden pea. I'd plant some good sugar snaps or snowpeas instead.