I've run out of Boost. O.o Help?

So.. as the thread name says.. i'm out of boost. I still have another 4-5 weeks of flowering left. is there anything around the house that can be used to replace it (fundage is a bit low so buying more isn't an option at the moment)? all my other nutes are fine. i've never run out of boost before so i'm not sure how much it will effect my yield.

small cheap bottle of pk13/14 or tomato feed at a quarter strength just a though

I assume walmart? lol