Despite being a Hobbit, I've made myself a Dwarf costume.
It started out as a Viking outfit for a fancy-dress party (I have some Viking blood in me) and became a Saxon warrior's costume for a pageant before becoming my LoTR Dwarven gear.
I have a rough woolen tunic (looks home-spun - cut from an old army blanket), helmet, sword, battle-axe and hugh wooden shield. The helmet is a simple one like the one Gimli had at Helm's Deep, a leather cap re-enforced with iron bands, except that mine has copper bands. I lack the skill to work iron.
I dream that some day I might be able to buy a chain-mail shirt.
Here is one supplier..