What are your reasons? If tension against windshield is your concern there might be too options. Maybe replace the spring with a heavier spring from your local hardware. I replaced one due to breakage, wasn't very hard. Option two is that there are little spring loaded clips made for cjs that might be able to work. Maybe someone could post a pic if that's interesting to you.
If your reason is looks, which ones do you have now? If you have the ones what are wide and painted (the paint always fades off) replace them from an older jeep with the chrome arms.