I wasn't able to find a dress EXACTLY like Sandra's, but I think this one (minus the sequins) would work as a possible alternative. It retails for $45 at Fashion Junkee (use the code sandy for 10% off) and you can click here to purchase.
I also found some shoes similar to hers, which retail for $89.95 (I couldn't tell if her shoes were nude or grey because of the lighting). Click on the photo below to purchase.
And finally, here's a simple green ring which retails for $39.50 at Banana Republic to complete the look. Click on the photo below to purchase.