Well, I've been hunting for a replacement and think I have found a good one. Thanks to all of you for commiserating, and more importantly for weighing in and pointing me in a few helpful directions!
This is perhaps the closest to what I had in mind. I like the pendant look that is just like what I was after, and I love that it has a dimmer swtich. This also makes me happy because it's a plug-in, like the original choice, so we can save money by skipping the electrician on install.
But...I also fell in love with this antiqued silver glass pendant from the Foundary for $30. Yes, $30! Incredible! But we could not make a decision quickly enough and it's already SOLD OUT. Boo. I should have just bought them! I'm sure I would have used them if my client didn't, but that's a slippery slope, my friends! Anyway, I may just keep checking back in the hopes that some orders get cancelled and they magically restock ;-) What would you do?