Apologies if this has been asked before - I did do a quick search on the forum, but couldn't find an answer - what's the recommended programmer to buy for bootloader burning on the MKR1010?
You should be able to use any CMSIS-DAP programmer/debug probe. I use this little open source debugger.
You can also turn an Arduino board into a programmer:
I can provide instructions for either of those approaches if you like.