a couple of shows back I ended up leaving my picks in the hotel :/
anyway, this is happened to me before, and I resorted to my usual solution in this case and ended up playing with a 5 euro cent coin, which is a copper coin.
i've always liked using a coin as a pick, and this reminded me of the super-bright attack you can get.
so i've just ordered 5 different metal guitar picks - 3 steel, a brass and an aluminium. it only cost me £6.70 or so, so I figure this will be cheap experimentation.
i imagine I won't be using these too much with a strat ;) but lets see!