Good to know they are indeed at Cornhill Nursey, although not on the website yet / for sale. I will give Bob a call and see if he will part with some scion wood. Thanks everyone!
BTW, I just found a tannic apple growing in the woods near my house, which is exciting the heck out of me. Brix 11 / SG 1.045; pH 3.44; TA 0.60%. Nice looking apple, lots of red stripes over a yellow base, scab free. Juice is dark in colour, pleasantly bitter and a little astringent. I have named it Sixpenny Pippin. Looking forward to growing it in my orchard. Unfortunately new growth is very high up and impossible to access. Might have to try bud grafting.