Couldn’t find your post from 2 days ago to help you out with the standing desk riser but Costco have them back in stock again and I’m ordering one for myself right now! https://www.costco.co.uk/Furniture-Home/Home-Office-Furniture/Desks/Seville-Classics-Airlift-Pro-Pneumatic-Sit-to-Stand-Desk-Riser/p/329204