I'd need to speak to the boss, but we may have a fawn and white indian runner drake spare, as I want to replace him with one of this year's hatchings. He's about three years old, gentle enough with the ladies and guaranteed fertile.
This is not a photo of him, but if you look at the chap on the far right, that's the general idea:
Let me know if you're interested, and I'll broach the thorny subject with Mrs Womble!