A couple of days ago, the Boleskine House Foundation made this announcement:
“For the next 16 days, we’re offering a rare opportunity to own a piece of original stone from the doorway Aleister Crowley installed in Room 6 at Boleskine House! 
This stone comes from a window Crowley infilled, and due to structural changes we had to make a few days ago some of the stone cannot be used in the reinstatement. We have a very limited supply – once these 100 pieces are claimed, there will be no more available from this room. The rest of the stone is all going back exactly as it was before.
“Donate £65 or more to claim your piece of history—each stone comes with a certificate of authenticity from Boleskine House. 
“Donate here: https://www.avivacommunityfund.co.uk/…/boles…/backers…
“After donating, simply email us your confirmation and address, and we’ll ship your stone anywhere in the world next week, with free registered delivery. 
“Tip: Click “custom amount” in the tip section to set it to zero and avoid extra fees.
“Everything we fundraise through this initiative will help us to de-carbonise Boleskine House, building back better, cleaner and lower carbon than ever before.
“This is a once only opportunity so act fast before they’re gone!”
