GiGDigit - Hotend Assembly - MP Select Mini V2* and Pro/V3
NOTE: Available for both type of the V2's hotend wiring. There are two options to choose from on the product page. This video should help explain the differences of the wire lengths.
Amazon - MALYAN Hotend Assembly for Monoprice MP Select Mini V2 and Pro/V3, Malyan M200 V2, V3
NOTE: Only one option available which is with the wire extensions. This is the same version as the “Original Version - with wire extensions” option at GigDigit linked above. GigDigit has options with and without wire extensions. This version will work with all versions of the V2 and V3. You may not need the wire extension but doesn't hurt to have extra cables on hand. This video should help explain the differences of the wire lengths.
With the exception of the Genuine E3D v6 & the Genuine E3D Lite6 the replacement hotends listed below are not necessarily recommended replacement options, i.e., they will theoretically work but the quality may vary. These are not the only options available. These should give you a good idea of what to look for. Please do your research or ask the community about their experience.
Autotune may not work all that great so maybe the following about running autotune isn't going to work. Some of the options listed below will require updating the firmware's thermistor value using the custom G-code command "M561 P1". If you do change the thermistor type/value you will need to run PID Autotune. If you are able to reuse the Select Mini's original thermistor it is STILL recommended to run PID Autotune
E3D-Online - Genuine E3D V6 All-Metal HotEnd
Printed Solid - E3D V6 HOT END KIT
Filastruder - ALL-METAL E3D V6 HOTEND
E3D-Online - Genuine E3D Lite6 HotEnd
Printed Solid - E3D LITE6 BUDGET HOT END KIT
Filastruder - E3D LITE6