It can be worth looking at some of the 'alternative religion' or maybe new age shops-and museum shops.

At a museum shop I got a superb 'pewter boar', which makes en excellent pin-too as the boar is a symbol of virility and stength-it goes well with the kilt.

Whilst in London shop called Mysteries I found some copper coloured metal 'dragon' badges. Again they make excellent kilt pins. As do Celtic/Norse pewter 'gripping beast' brooches.

Non of the above are that expensive, and can look better on a kilt than some of the pot-metal things offered as kilt pins by the suppliers.

James