Have you looked into @hivelist? People are selling physical products there, including books. It has facilities to work out shipping costs and various payment options. I've see @drwatson is using it for his comic and @stickupboys for their merchandise.
I looked at your book on Amazon and the shipping to the UK was not too bad. $8, compared with $25 for a comic on Hivelist. I expect Amazon can negotiate good rates. I could get the ebook, but it's not the same.
Thanks so much for passing those details on. I am the same with it comes to having a physical book, especially when it comes to running books. I like having the tangible product. I am really glad it is not too expensive for you to get in the UK, cause it is pretty pricey to get sent to NZ($25 NZD). Thanks for passing on the details about @hivelist as well. I will check them out now.