Replacement hot end - extruder head
I need a new extruder head (hotend) but I cannot find a way to order it.
The orange insulated wires broke off while I was doing the upgrade to MK3S,
RE: Replacement hot end - extruder head
Go to the Prusa eShop, make sure you are logged in,
look in the Mk3 spares list 
consider getting a spare 24volt heater and extruder thermistor, plus PTFE Tubes for the extruder, and you can replace the existing kit, to get going quickly, and repair the old one for standby!
regards Joan
or you could order direct from E3d or one of their distributors!
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: Replacement hot end - extruder head
Thank you! I could not find the spares before
RE: Replacement hot end - extruder head
I keep one new one in the house at all times. if you replace the heat cartridge or thermister, use a heat gun and plier before you use an Allen wrench.
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Chuck H
3D Printer Review Blog