plushaddict sells minky ("Shannon smooth" they call it) which is a very short, cheap fur. it's a 2mm pile or something, I use it for the jackalopes, gryphons, abdabs and other small things I've been producing lately.
mohairbearmakingsupplies.co.uk is best for small amounts of reasonably priced fur, look under 'the fabric room/faux furs', they have sizes on there too. you can get 1/16th of a yard of really good quality fur for £5.55 there