Amazon.com: for ATMEL 51 AVR USB ISP ASP Microcontroller Programmer Downloader with Cable + 10Pin to 6Pin Adapter Board for Ender 3 or Ender 3 Pro Geekstory : Electronics
Pololu USB AVR Programmer
Avr Atmega16 Minimum System Board Atmega32 Development Board + Usb Isp Usbasp Programmer For Atmel Diy Kit - Integrated Circuits - AliExpress
1LOT New USBASP USBISP AVR Programmer USB ISP USB ASP ATMEGA8 ATMEGA128 Support Win7 64|Demo Board Accessories| - AliExpress
Amazon.com: for ATMEL 51 AVR USB ISP ASP Microcontroller Programmer Downloader with Cable + 10Pin to 6Pin Adapter Board for Ender 3 or Ender 3 Pro Geekstory : Electronics
Standalone AVR ISP Programmer Shield Kit - includes blank chip! : ID 462 : $17.50 : Adafruit Industries, Unique & fun DIY electronics and kits