You can change the belt without any locking tools - did mine a few months ago.
Both the cam and crank sprockets have a mark on them, turn the engine over until the crank marker aligns with the slot. Your new belt will have two white lines, align these with the marks on the pulleys and you are done. The fuel pump is not timed so no need to align this.
You will need some 'Ribe' bits to remove the belt cover and crank pulley. You can just about get away with jamming a Torx bit into the bolt heads but it makes sense to use the correct tools.
The other slightly tricky bit is tensioning the belt. I fitted a 'slave' bolt into one of the belt cover holes and used this as a fulcrum for a large screwdriver. Lever against the tensioner until the pointer lines up with the 'dot' on the tensioner. Once you have done this, turn the engine over 2 revs and recheck/adjust the tension. Keep doing this until the tension does not change.