https://shenzhenshengdian.en.made-in-china.com/product-group/FevTmOZUyzVw/PCB-Buffer-Machine-1.html
PCB Buffer Machine - Shenzhen Shengdian Electronic Equipment Co., Ltd. - page 1.
China PCB Buffer Machine catalog of Customized Automatic Cooling Storage PCB Circuit Board Handling Equipment SMT Line PCB Buffer Machine, Factory Price...
pcb bufferelectronic equipmentmachineshenzhen
https://effectslayouts.blogspot.com/2016/01/jhs-little-black-buffer.html
Perf and PCB Effects Layouts: JHS Little Black Buffer
Here's a simple buffer from JHS. It really only uses one side of the opamp (why not just use a TL071?) and the extra resistors on the other ...
little blackperfpcbeffectslayouts