Some fighters make their own weapons as prices have skyrocketed. The only well-stocked militias are those affiliated with Islamist factions.ALONG THE SYRIA-TURKEY BORDER — The bomb maker was displaying his homemade mortar launcher, crafted from a tube and bits of metal. "Whatever we need to produce, we Google it," said the factory worker turned rebel commander and arms procurer in a border village where goats and insurgents walk along steep mountain paths.