Quick and dirty scad file for a more-or-less LEGO 4547958 compatible piece.

technic_1x2_with_hole_and_extensions_4547958.scad.scad

// https://github.com/cfinke/LEGO.scad
// https://github.com/cfinke/Technic.scad

use <LEGO.scad>;
use <Technic.scad>;


block(
    width=1,
    length=2,
    height=1,
    stud_type="hollow",
    brand="lego",
    horizontal_axle_holes="yes",
    horizontal_axle_hole_shape="round"
);

translate([4, 2.98, 5.92]) {
  rotate([90, 0, 90]) {
    technic_beam(length = 2, height = 1/2, axle_holes = [1, 2] );
  }
}

translate([-7.9, 2.98, 5.92]) {
  rotate([90, 0, 90]) {
    technic_beam(length = 2, height = 1/2, axle_holes = [1, 2] );
  }
}