Not really an answer to your question but more of an observation. Big box HD has for the last several years sold Italian Stone Pine during the holidays as a table top Christmas tree here in Maryland. I regard this as a disposable tree. Have never seen one survive the winter here. I'm talking about Pinus pinea. You might let us know where you are posting from.
{{gwi:493544}}

My Pinus pinea survived the winter of 1996 when it was relatively small...only a few mature needles. That one wasn't as cold as 1994 but was still pretty cold...down around 0F. It came from Forestfarm and I believe their seed source back then was an old tree known to have withstood the coldest PNW winters.
The tree at NCSU was not killed by roughly -9F in 1985, according to JC Raulston's notes. I think that tree was removed for the new visitor's center around 2000-ish.

I've debated about trying one again but I think they take a long time to become picturesque...take up a lot of room...and there's no guarantee you'd get a clone that could withstand a really cold winter like the last one.

I am in San Antonio, TX. They grow beautifully here, but I only see mature ones around. I would like to see some trees in earlier stages of their growth.

They are pretty ugly for couple years they are switching over to adult foliage, and for the couple decades following that, are certainly not going to win any conifer beauty contests. IMHO they have to be fairly large for that distinctive form to look picturesque. And oh I forgot to mention I think heavy snowfall here would also be a problem for them...not an issue in central TX.

http://www.gardensandplants.com/uk/plant.aspx?plant_id=2523

and...

Here is a link that might be useful: http://www.majestictrees.co.uk/tree-shrub/378-pinus-pinea

Thanks for the links. Too bad there is no information about their age or planting date.

"Here is a link that might be useful: http://www.majestictrees.co.uk/tree-shrub/378-pinus-pinea";

Oh dear, their foliage-with-cones photo shows Pinus nigra. Ooops!!

Resin