LOL, I know what you mean about remembering names becuase no one can be worse than me....my name memory is just aweful its embarrasing sometimes.
Anyways, the style you want is the most popular style and the medium/smaller size is also the most popular size. I have one and it is my most favourite Chloe bag.
There are a few on ebay, and BTW, there is one that just popped up on ebay that also has the messenger strap which is a great feature to have (and cannot be added to bags that don't have it):
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=180231087927
Just make sure you get this bag authenticated....