I was in a rush and I was checking the ps reservior and my brake fluid because theres a leak in one of the reserviors and I was in a rush and left the cap for the ps on the strut tower and I lost it, ha, where can I get a cap ASAP?

 

You should be able to find one that fits from Advanced Auto or NAPA. The sizes for the component caps are usually pretty standard for non-US made cars (i.e. the brake reservoir cap is the same size as my BMW E46 M3 brake reservoir cap).