Hi Simon,
we have a bunch of sub $400 ($350 with local pickup) brand-new twin tips that are approximately 10 years old in various sizes sold complete with pads, fins and handle. The smallest one we have is 125cm:
www.kitebud.com.au/product/force-freeride-twin-tip-125cm-complete/
The pads are highly adjustable and can fit very small feet (size 6-7). We can also sell it board, fins and handle only.
Hope this helps
Christian - KiteBud