Hi J79 and welcome to GoY. We are a bunch of friendly gardeners mostly amateurs but with the odd professional we don't sell anything here just give advice.

Whomever sent you the video should be able to supply the cacti I would have thought alternatively a specialist grower is your best bet.

Grows on You is a forum site where gardeners chat to each other. We don't actually sell anything.
You could try clicking the 'Garden Centre' button at the top of the page where a number of things are advertised but, if you want specific cacti then I would suggest that you go to a specialist grower.

Thank you for your reply but the video was forwarded to me and I think it came from OZ

Then you need to contact a specialist cacti grower just do a google search

Many thanks to you all for replying to my question
J79m80

Once you've located and bought your cacti please do put up photos on a blog so we can all see them.

I took the pictures of the cacti I copied from the video I received to the garden centre and asked if they had any or could they get them. I was told they could not as when they get them in from Holland they are not named they are just called cacti plants. However I did buy 4 small ones and I hope went they grow I`ll be able to match them up with the pictures.
j79m80

http://www.glenhirstcactiandpalms.co.uk/cacti.html
I have just seen this cactus specialist seller in Bedfordshire who do mail order. The prices seem reasonable so you might want to look at their catalogue.