Extension Cords needed, can't find
You can legally change the outlet, as long as it is “GFCI Protected” and marked “No Equipment Ground".  You'll get the safety benefits of a third wire ground, though not all the surge protection benefits of your power strip.  The GFCI units do use some 'vampire' power, about 1 Watt, 24/7.

Section 406.3(D)(3) of the 2008 National Electric Code covers this situation. 



Consider also a whole house surge protector, and if you have K&amp;T wiring, an AFCI on the K&amp;T.  That said, if any of this sounds unfamiliar, hire a home inspector to check out everything and provide advice as to priorties.