Amazon.com: 10 Pin to Standard 6 Pin Adapter Board + USBASP USBISP AVR Programmer USB ATMEGA8 ATMEGA128 ATtiny/CAN/PWM for Arduino : Electronics
Pololu USB AVR Programmer v2.1
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
Amazon.com: KeeYees 2pcs Downloader Programmer for USBASP for ISP with Cable and 10Pin to 6Pin Adapter Board for 51 for AVR Series Microcontroller : Electronics
MRA01 - AVR Programmer Set (with ISP and Adapter for ATtiny, ATmega and AT90)
Universal ATMEL AVR ISP programmer from heilingch on Tindie