One of the (very few!) perks of living in the UK is that we have LOADS of the correct vintage soda syphons on eBayUK. Picked this one up for £4:
http://i.imgur.com/toTvOqy.jpg
And I looked this out from the back of a cupboard (I bought a pair years ago from an RPF member who was doing runs of the cast for the AT-AT helmet):
http://i.imgur.com/d1bfkwr.jpg
http://i.imgur.com/G7leNsq.jpg
Vintage dive mask ordered from eBay. And Nebulizer mask. I'm HOPING that the nebulizer mask I receive actually looks like the one in the picture....
Ready to join the fun....