What I would do is do everything in the experiment I suggested, but use copper sulfate instead of the ferricyanide. Copper should also catalyze the reaction well. Make sure you scale the masses appropriately because the ferricyanide will have a different molecular mass than copper sulfate. If it works, you're golden. If not, you have something to fall back on, and most decently equipped chemistry labs at a university should have ferricyanide - which is the traditional reagent and will definitely work the best. And like I said, until you get it to work, cut the scale down by an order of magnitude (divide everything by 10). This way you don't waste a lot of materials.
(Don't worry about the blood lancet. It'll work with the iron salt for sure. If it doesn't, something's wrong and the lancet isn't going to help.)
EDIT: A word of warning, though: don't mix the ferricyanide with a strong acid, unless you fancy breathing in some HCN gas.