Sadly, wild wire candelabras are not a cheap choice for a wedding centerpiece as most cost well over $100 and if you need several of them...well the cost will be prohibitive.
Tranquillity Valley.com have a beautiful candelabra with glass cups on sale at $128.00 which may be an option if you only need one stunning centerpiece.
An alternative look can be created by buying some thick but bendable wire from a DIY store and shaping it into a tree-like shape then hanging light-weight tea-lights from the "branches" to create a similar effect.
Update November 2011 - I just bought some solar lights for outdoor use/Christmas decorations etc. I suddenly thought what a great way this would be to decorate an outdoor wedding venue - and you don't need any power as they work from sunlight :) You could maybe even get creative and use them to create giant-sized candelabras using heavy duty wire.