Finally finished!
I don't wanna know how much this has ended up costing!
Charms:
Horcruxes: Snake - Nagini, Riddle's diary, Ravenclaw's diadem, locket, Gaunt's ring, Hufflepuff's cup
Houses: Snake, raven, bagder, griffin
Random other charms: Death Eater skull, owl, Godric Griffindor's sword, 'H' 'P' & lightning bolt, prophecy (crystal ball), silver doe, Sorting Hat, broomstick
Now I just have to remember to wear it...