I'm not familar with Fenton cameo, however, I do know that a great deal of the cameo glass that comes onto the market is made in Romania. There are also Chinese firms offering cameo glass (though it's a little confusing as Romanian cameo is also sold in China). My thoughts on seeing the pieces in the links was that were likely modern Chinese or Romanian production. However, as I say, I'm no great expert on modern cameo so i could be wrong...
Do a search for 'Galle' on Alibaba.com , I suspect you'll find something similar...