Thomas light up sippers - Help!!!

I am desperately searching for these Thomas light up slippers in a size 5 junior
http://www.iwantnewshoes.co.uk/rangedetails.asp?brand=9&rangeidentid=K77&category=15
They are out of stock on this web site and I can't find them anywhere else. They need to have plastic soles as I had some with soft soles and they became mis-shapen very quickly and were no good for my little man's growing feet. I would prefer a pair exactly like these but am open to suggestions if you find anything else simlar (with flashing lights on the top, he won't be able to see flashing lights on the sole). Rep and points waiting!!!
Huge thanks x