I've had three quotes to put in plantation shutters in our two-bedroom flat. One of the quotes was for a product called Fusion20: http://www.fusion20shuttersandblinds.com.au/index.php?option=com_k2&view=item&layout=item&id=10&Itemid=92 which is a carbon/glass fibre reinforced with polymer with an aluminium insert. Its marketing material claims that it's as good as timber without "timber's inherent problems" (but price-wise, it's the same). It also comes with a 20-year guarantee (whereas basswood is only guaranteed for 3-5 years).
Has anyone had any experience with this material? I haven't managed to find much independent content about it online.