Master of the Forge now has a small supply of resin cast Monstrous Feathered Wings for sale:
From their post:
I have two dozen pairs of casts of these wings available now that are up for sale in the Store. Each wing is 100mm tall, 50mm wide and averages 10mm thick, making them very nice and chunky. There is almost no flash to clean up on them, a testament to the skill of the caster (ie: not me). I’ve priced a pair of wings at £11.99 each, with £1.99 to cover shipping costs (to anywhere in the world).