You are welcome to borrow one of my tools, they are like the ones seen on Ebay for £75
Post is about £6 but I do ask for a returnable £20 deposit to try and ensure they come back to me for others to use. The tool has the correct 1/2" square for a torque wrench as well as a 30mm hexagon. If you look on Ebay you will see what they are like.