If you mean Solanum crispum 'Glasnevin', you might find a supplier on line - Amazon appears to have a small plant for sale now, but quite honestly, I'd wait till next spring - although this plant is listed H4 with the RHS, which means hardy 'throughout most of the UK' , a small plant in a bad winter might not make it.

Most garden centres stock them from end of May onwards.

Hi, I agree with Bamboo, but quite honestly I wouldn't buy 1, they get a lot more leaf than flowers, which look like the flowers on a potato only blue, and grow to tree like proportions, Derek.

I've had one for many years in my garden in the Midlands. It grows over an arch with clematis and honeysuckle, and flowers profusely May - October. It died back one year in a hard winter, but grew again the next. I disagree with Derek, it's well worth it!