Just reading through Coda's relay bypass. He recommends using the PicKit2 to actually burn the code, all i can find to buy is the PicKit3 from digiKey (Digi-Key Part Number: DV164122-ND) can that be used?
I recommend getting a cheapo Pickit2 from ebay, from what I've heard the Pickit3 is more temperamental and frustrating to work with. You can get the programmer and a ZIF board on ebay for like 15$ total. (This could be false, given how little I know about programming, but I decided to not risk it since it was cheap enough)
https://www.ebay.com/itm/1PCS-PICkit3-PIC-KIT3-PICkit2-KIT2-Debugger-Programmer-Emulator-PIC-Controller-K/222523796767?hash=item33cf73ad1f%3Am%3Am31ApzsAjGXRbN-oQsCpkvw&var=521371527430 etc, there are tons of sellers, poke around a bit.
One of the FFX guys used to be a design engineer at MicroChip and does all of our programming. FWIW, he recommends the Pickit2 and that's what we use.
I've seen them on amazon for about that as well.