I don't know if they have them in your area, but another place to look that has been good to me, are swap meets and garage sales. Again - look outside the box.

As Hamish reminds us, we should put one kilt pin on a kilt and not change it, as you may damamge the kilt. I am still trying to get enough kilt pins so that I don't have to change them around, and I'm getting close.