Both Skye calf and shell versions are indeed C&J shops and C&J mail order only.
I think the calf is around 425GBP inc. VAT and 600GBP inc. VAT for the shell. There'll be P&P ontop of that if you get them by mail order.
You should contact them via their website to check on availability of your size.
Sorry, what is P&P? And if I order from their UK store, they'll deduct the VAT, making it cheaper than ordering from their USA store, right?