http://www.leisureshopdirect.com" onclick="window.open(this.href);return false; sell the plastic version for £6 plus £5 postage. I've bought 2 for my early bay and joined together make one long sliding rail for the table. If you fancy doing the same you'll need a small counter sinking bit to recess the mounting screws in the 3mm plastic. The shelf attached to the table is 18mm deep.