10 Pin Convert to Standard 6 Pin Adapter Board+ USBASP USBISP AVR Programmer USB | eBay
Amazon.com: Geekstory for ATMEL 51 AVR USB ISP ASP Microcontroller Programmer Downloader with Cable + 10Pin to 6Pin Adapter Board for Ender 3 or Ender 3 Pro : Electronics
10pcs 10Pin To 6 Pin Adapter Board + USBASP USBISP AVR Programmer USB ATMEGA8 ATMEGA128 ATtiny/CAN/PWM 10Pin Wire Module DIY