you in a rush to do it? I'll look for a spare tool for when you collect the FRO
service depends on whats wrong exactly?. if the pedal bodys loose on the axle thats an easy fix, same for regreasing. the new shimano 520 pedals are cheap as chips new & work extremely well if a cheap replacements needed (damn site more reliable than eggbeaters, seen 4 different pairs of those explode recently!)
for once shimano didnt make changed requiring a new tool every upgrade. so the same pedal tool works. in recent years they're changed the locking colar to alu & you can use a standard spanner