Are you within range of an Ikea? Lots of folks are using kitchen cabs in their baths these days, and Ikea makes the best cab [for the money] you can buy.

You can go to HD, of course: I bought some custom vanities from them, made by Kraftmaid. Like them very much, but wouldn't use them in my kitchen, just because they are a framed style, and I like frameless better for kitchens.

Downside with these semi-customs is that the wait is around 6 to 8 weeks right now, whether you go to HD or Lowes. The other downside is cost: if I do my kitchen from Ikea, it will be about twice the cabs for less than half the money I spent on vanities at HD.

HD also has off the shelf cabs with little or no wait for much less money. At my local stores, they have a better selection in this dept. than Lowes does.

Of course, you can also look in the Yellow Pages for a locally owned custom cab shop. Usually better quality, and less chance they'll be damaged in shipping. Often surprisingly affordable.