if you can afford to buy in bulk, this website sells Organ brand titanium needles for home sewing machines.
100 needles (many sizes available) are $42.95
compare that to $6.99 per pack of 5.
you'd save 70%
(the large-eye needles for metallic - 2 sizes - are $58 per 100. 60% savings)
http://www.ctsusa.com/_e/dept/21/Hou...ne_Needles.htm