eBay
3D printing L shape fitting for the wiper arm tubing of 2002 to 2006 chevy and GM trucks and SUV. Fit several models.
The 3D printing material is Glass-Filled Nylon, witch is a strong and UV-resistant material.

IMPORTANT
If the part you are replacing has broken, you should make sure that no pieces are left inside the tube or plug. To remove the split piece use a thin lag screw, screw it into the hole carefully and pull it, the split piece will come out inserted in the screw tip.