A very easy way to accurately align the stencil with the PCB - PCB Design Tutorial - PCBway
High Precision SMT Stencil/SMT PCB Stencil/SMT PCB Stencil Solder Paste for PCB Assembly with Aluminum Frame//SMT Stencil for SMD LED Assembly Line - China SMT Stencil and SMT PCB Stencil
DIY home made SMD metal stencil - YouTube
What are Available Options for PCB Stencil? | PS Electronics