Lots on here on the psychology of postwar France in relation to the Vichy thing, & De Gaulle's efforts to rebuild a sense of identity, the 'Historiography and memory' section I found particularly interesting.
Simon Kitson_-Vichy
I've google-searched the site and can find little or no reference to Vichy memorials, it does appear that the subject has, understandably, been swept under the rug somewhat, but there's lots of links on the page too, they might lead to more.