Hey Pman,
Here is the one I use which I got from Amazon last year
Amazon.com : Crystal Ball 150mm, Clear : Christmas Ball Ornaments : Everything Else
I highly recommend it if you are looking for a large heavy sphere. It is 150 mm and weighs around 8 pounds I would guestimate. It also photographs very well.
Pretty much the whole basement is mine, so if I wanted to expand I could. I will be hanging dozens of my photos, most in frames, some in just mattes. The upstairs looks like a respectable, normal home due to the wife. The only say I had upstairs was the entertainment center in the living room. I do not know how many people on the forum have gone through the process of selling a house, buying a house, and moving after living in the same house for 25 years. It was one of the worst experiences of mine and my wifes lives! They say the only more stressful thing is a death in the family. But now that it is all over and we are moved in and getting back to normal, and have my Laser Room 100% set up and done it was all worth it.