I believe I've found a solution, but if anyone has a better method, let me
know or post a message.

Requires 'include "transforms.inc"'.

    #macro Point_At_Trans_MyO(MOrigV,Target)
      translate -MOrigV
        #local Z = vnormalize(Target-MOrigV);
        #local X = VPerp_To_Vector(Z);
        #local Y = vcross(X, Z);
        Shear_Trans(X, Y, Z)
      translate MOrigV
    #end

Where positive Z is the front of the object (the part you want to face the
target), "MOrigV" is the vector of the object, and "Target" is the vector
you want to point at.

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