Find a locksmith that owns one (many professionals in the safe business use them) and make friends and offer to rent it or, if he really likes you borrow it when you need it. just an idea.

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'95 E320 Wagon my favorite road car. '99 E300D wolf in sheeps body, '87 300D Sportline suspension, '79 300TD w/ 617.952 engine at 367,750 and counting!