Don't know if you have an IKEA around, but if you do, check out their cushion covers (I think you can also order on line for many of them). They have some amazing choices for a very reasonable price, and their feather pillow stuffers are terrific, again at a good price (they are not down, but fowl feathers, and are a great deal - I have a ton of them). The Alvine Lov pillow is wonderful, all embroidered, and a good size for your couches. I have two of those - shades of yellow, green and a blue-grey. The Urusula could be a perfect neutral for in there, and is 26x26, so a good corner pillow, with something more colorful in front of that if you like. I also like the Benzy Land.

They were probably made by Keeler Brass Co. of Grand Rapids, MI. Keeler Brass was the leading supplier of furniture hardware for most of the past century. In 2006, Hickory Hardware brought together five of the finest hardware companies in the world  Belwith, Keeler Brass, Wright Products, Madico and Faultless Caster. It appears that myknobs.com is the exclusive vendor for Hickory Hardware. Chances are slim that you will be able to obtain an exact match. Here is a link that might be useful: http://www.myknobs.com/hickoryhardware.html

I had pillows made by an upholster. I made my out of 2 different fabrics so I can switch with the seasons - with the welt cord a contrasting fabric. Here they are with the wool plaid for winter. And here with the khaki linen. Older pic but only one I have with old couch... On my club chairs I had kidney pillows made the same way but they are tufted with a button of the constrasting fabric. Smiles:)

Without knowing your color, size, or budget preferences, try this, Etsy search for "block print paisley pillow" (it's set for me in Canada but you can change your own settings)