I'm also entering this into Pixie's Crafty Snippets Playground where Miss was given a lovely present last week of a candle jar lid to stand her card on. I too have been looking for one since I saw the very talented Bev Rochester use one to show her cards on her blog but I've never been lucky enough to find one. However, while in Pounland on Friday I got this little set of two Lily Lights which just about work.
Although nowhere near as pretty, they do light up and change through a range of colours. I'm going to have a play and try some alcohol inks on one of them