For the past several years, the only way to obtain a Region 1 DVD of David Lynch's surreal classic was through his own website, www.davidlynch.com. It is now available through a wholesaler (at distinctly un-wholesaler prices, meaning mucho $$$) for retailers to stock either the standalone DVD or box-set containg a selected collection of Lynch's short films. Expect to shell out at least US$40 ($80 for the box) for this one if you spot it at the local DVD store.
DavisDVD via Bloody Disgusting.