Safety pin style kilt pins

[Tasty Rabbit]

I picked up a couple from craft stores like Michael's & A C Moore . They have plenty of things in those store that you can use to fancy them up yourself .

[Madadh]

A quick google image search for kilt pins will give you lots of styles for the old horse blanket pin you are looking for.

[ForresterModern]

Go to Amazon and do a search for "blanket pin" and you should find all manner of such pins in a variety of sizes and colors. Not too expensive if you are not going fancy.