Have you tried Nylon 6/Nylon 6,6 with some glass filler.
Akro-Plastic Akromid® B3 GF 30 (2472) PA 6 Conditioned, 30% Glass Filled has some of the following properties:
Tensile Strength- 110 MPa/16000 psi
Melting point- 220C / 428F
Quadrant EPP Nylatron® GF30 PA66, 30% glass filled, extruded...