I'm interested to see what you receive Birch Bay. I sent them an email trying to confirm availability a couple of years ago, and never got a response. I know they have good stock. The mail-in ordering definitely needs to go. I'm not a fan of the no buttons/send email/invoice me via PayPal vendors, but that is still far more 2021 than the 'checks only' vendors. I've purchased from Lowes Dahlias (now closed) and Delightful Dahlias, and at least they always send me an email once they've received my check.
I'll probably never grow Kelvin Floodlight. Yellow is just not my jam, though I do enjoy your pics of it!