Just to be clear... the top one in the photo you could make- yes
Camshaft Timing Bar (T3880502) - ($197 US) I can't believe I paid for this, but now you don't have to. This is simply a flat bar of steel: 240mm X 24mm x 4.93mm
The bottom two - no way and you aren't going to be able to do the job on this bike without them. You must order these two along with all the other necessary parts (gaskets, filters, etc,...)
Crankshaft Locking Pin (T3880501) - This one you'll need ($92 US)
Timing Chain Tensioner (T3880651) - ($36.07) This one is also required. Not to be confused with The camshaft drive chain tensioner on your bike.