Here's who I've been having the boards manufactured by: https://www.elecrow.com/5pcs-2-layer-pcb.html https://www.elecrow.com/5pcs-2-layer-pcb.html They're by

Here's who I've been having the boards manufactured by: https://www.elecrow.com/5pcs-2-layer-pcb.html https://www.elecrow.com/5pcs-2-layer-pcb.html They're by far the cheapest I've found. They charge $5 for 5 PCBs, with a 10cmx10cm area each. The cheapest shipping at $6 will get them to you in about 20 days from order date, while the Shenzhen DHL shipping option will get them to you in about 7 days from order date. At least, that's been my experience ordering from them.