This recipe requires Iso-alpha concentrate which can be purchased from http://www.the-home-brew-shop.co.uk/acatalog/Isomerised-Hop-Extract-57ml-Isomerized.html. I'm not sure of the correct amount to use as mines came measured, but I made my brew with an IBU of 30. Also. all the hops in this recipe are in hop teabags which are added to the end of fermentation. The teabags can be purchased from Amazon or Ebay. Here's the recipe:

Bring 3 liters of water to a boil. Add Candi sugar and dissolve. Add spices in a musin cloth and boil for 10 minutes. Add this concoction, including spice bag to fermentation bucket. Add liquid malt to bucket and stir until evenly distributed. Top up bucket of fermenter to 23 liters. Add liquid Iso-alpha concentrate to wort. Oxygenate the wort by stirring it vigorously creating a foamy layer on top of wort. Pitch yeast on top of wort. No need to rehydrate yeast, but feel free if you like. I used two packs (20g total) of Mangrove Jacks M41 Belgian Ale yeast. Allow to fermentate at 74F for at least two weeks. Once fermenation is done and stable, boil 500ml of water and add to a bowl. Add all hop tea bags and let seep for 10 minutes. Add this hop tea, including tea bags to wort. Allow this tea to seep in fermentor for 5 days before bottling. Batch prime wort using 6.5oz of dextrose and bottle. Allow to further fermentate in bottles for 3-6 weeks or longer.