The only Monroe's...
Size 28 @ $117
http://cgi.ebay.com/ANTIK-DENIM-Monr...QQcmdZViewItem
Im not sure how sizing runs for womens. but I wear the same in Antik as Diesel, TR, PDC, etc.
These are the basic Antiks...
Fawcett 28 @ 59.99
http://cgi.ebay.com/Authentic-Antik-...QQcmdZViewItem
Unfortunately, thats about all I saw that was decently cheap...I'll keep my eye out though!