I've never replaced a GPU with a new air cooler, I always go liquid. On top of that I've only used one thing, NZXT G10 VGA bracket. It mounts a fan bracket to your card, then offers a space that allows for a lot of the big name closed loop coolers that have the circular waterblock to be mounted. Looking at G10 compatibility, some variations have a thicker board and might require longer screws but other than that, NZXT says it'll fit a r9 290.
http://www.nzxt.com/product/detail/138- ... acket.html $30
Zalman and corsair make a fairly inexpensive 140mm cooler at like ~$50
If you're looking for air cooling, sorry.