Hispi cabbage replacement

I've grown Hispi cabbage for a number of years after recommendations on this forum. However it seems that seeds are now quite hard to come by.

Does anyone have any suggestions for an alternative? King's are suggesting Caraflex:

https://www.kingsseeds.com/Products/Organic-Vegetables/Cabbage/Cabbage-Caraflex-F1

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Hi

Greyhound is the oldest variety, quickest to germinate, fastest to harvest, tastes as good as the rest and also the cheapest per packet, why look anywhere else!

Hipsi with me had always terrible germination in the first or second sowings, so I gave up on it!

I'd agree with MoS about Greyhound.  They are a brilliant cabbage, but last year I planted a few too many, and by the time I got round to the last of them they were weighing in at an average 7 lbs each.  It just sounds so mean when you ask someone if they'd like to share a cabbage with you, doesn't it, but they were just too much for the two of us.