Looking for purple tree collards

I was wondering if anyone out there has starts of the purple tree collards they would be willing to share. I'd be willing to trade or cover shipping. Please let me know.

Thanks

if they will grow in Michigan zone 4/5 I would love to try some as well..also want to try some other perennials that I haven't tried yet yere..like groundnut..etc

I have had swiss chard become perennial here ..which is amazing..it comes back every year in my greenhouse like a weed now..