Having recently made a day plaid or laird's plaid from my extra tartan material, I need to find a plaid brooch if I want to actually do anything with it other than fold it and drape it over my shoulder. For wearing as a half-cloak, full cloak, chest wrap, or other variations, it needs to be pinned. Ideally, I would only be carrying this heavy beast if I'll be spending several hours out-of-doors in very cold weather. This would only be once every couple of years. My plan would be to just drape the plaid over my left shoulder, neatly folded, and carry the brooch in my sporran until I feel the need to unfold the plaid and wrap it around me, or perhaps my wife.

I'd like a fairly traditional-looking brooch, but nothing overly fancy or ornate. I don't need sparkly stones, chrome plating, or anything "blingy" like a piper would wear. My preference would be plain metal with engraved or cast traditional Celtic knotwork or similar, but no clan crest motif, Saltires, or any such type of symbology. Really, I'm just looking for something rather tasteful and unpretentious.

I'm not really even sure where to look for this. Ebay and most of the Scottish shops are full of cheap pewter jobs and plated pot-metal examples under $15. I don't want bottom-of-the-barrel quality, but on the other hand I don't want to spend hundreds or thousands on a Victorian hallmarked silver antique. What would be a reasonable middle-of-the-road price for a plaid brooch of decent quality, and where would I shop for such? Vintage would be nice, though I'm not opposed to new manufacture.

Also, I see many of them advertised as fly plaid brooches as opposed to plaid brooches. Is there a difference between the two in terms of size or other details? It seems like 3 to 3-1/2 inches in diameter is about par for a full plaid brooch.