I followed tradition because I thought it was cute but other than the pictures of the details no one really notices so don't stress over it. If all you're missing is something borrowed, borrowing whatever jewellery you still need or a purse or something will save you from having to buy it.
I couldn't think of anything borrowed either or the something blue.. other than possibly painting my toenails blue. I don't think I will end up following this tradition. We aren't doing any of the other traditions either, like the garter or bouquet toss.
I think it's a really nice idea but my fiance and I aren't super traditional so I probably won't be sticking with this one unless it happens by accident. We're also skipping the bouquet and garter toss and not having a cake.