Welcome to Backyard Chickens, so glad you joined the flock. I had friends in Australia many years ago. I used to hybridize Streptocarpus plants and had some with variegated leaves. My Aussie friends where eager to have some but with all the red tape, etc. too expensive for them to get plants and then pay for quarantine.
The only way to send any were seeds. So I was able to send them batches of seeds.
One excellent hybridizer sent me photos of the variegated plants that grew from the seed.
He in turn sent me seeds from his yellow flowering hybrids. The color was very rare here and they sold extremely well. All I can recall was his name was Charles. I'm elderly and my memory isn't so great but, if I allow some time to pass- I'm sure the rest of his name will come up.