I bought a military surplus Skedco Warfighter Extreme Medic (made by Eickhorn) and decided to send my inquiry about the spanner wrench normally included (but missing) to Skedco, as opposed to Eickhorn (this model is exclusive to Skedco, though made by and also marked Eickhorn). Eickhorn is bad for not returning any emails sent to them.
They asked for my address and sent me one free of charge.