It is recorded as quite rare, so I am not sure how often it may be encountered while fruiting, but I would really like to try raising some seed.
As there are a few here who enjoy foraging and wandering through the forests, would you mind keeping an eye out for me and if possible collect, dry and send me some seed? I'd be happy to pay for your time and post.
Here is an ID link [/url] http://www-saps.plantsci.cam.ac.uk/trees/service.htm [/url]and some pics to help with identification...

Leaves-
Fruiting -