I read somewhere that the important thing for Table Tennis shoes is grip and lateral support, so opted for some shoes that were good for Handball as apparently they have the same rigourous demands as TT.
Here are some black Handball shoes available in the UK ...
Indoor soccer, badminton and indoor volleyball are closer for TT shoes because they are indoor court shows. I think I have been using my black indoor soccer shoes for 2 years 3 months. They are still decently strong.
The Asics Gel Rocket-7 volleyball shoes are the best court shoes I've ever worn! Best TT shoes I've ever tried, including anything from the TT companies.