Before parting with your cash try to design them on your own. You'll find it surprisingly easy. I mainly deal with vectors so when it comes to resizing images they always retain their quality no matter how large or small. Forget using filters, you can accomplish any effect by tinkering with the blending modes and the end result is far better visually.
Start by experimenting with the
shape Tool and
Pen Tool, the pen tool is a newbies nightmare to begin with though it's versatility in the creation of the many wonderful shapes makes learning this tool all the worth while. 99% of my works consist of dealing with vectors and the pen tool so I stand by my recommendation/method.
A quick example (as i had this opened in photoshop) the forum status icons on the left where designed in less than 5 minutes and purely from vectored shape (base) Pen tool (doc, padlocks arrow). always start simple as this will produce the best results.
Pending you have a graphics editor at hand or photoshop.