Amazon.com : Canon 550 EX Flash for G6, G5, G3, G2, G1, Pro1, Pro90 & all EOS SLR Cameras : On Camera Shoe Mount Flashes : Electronics
Amazon.com: Replacement Battery for Canon 540EZ 550EX 580EX 580EX-II EOS-1D Mark IV EOS-1D MarkIII EOS-1D X EOS-1Ds Mark III MR-14EX MT-24EX : Electronics
Amazon.com : SGM400 INTERFIT STROBIES Flex Mount for Canon 580EX/550EX New : Electronics