Power headers
Eurorack power headers...
Parts
It can be pretty difficult to search for some parts on different stores so we’re compiling a bunch of links to common parts at different stores here.
Power cables
Parts to make your own eurorack power cables...
Operational transconductance amplifiers
Texas instruments has discontinued the DIP-16 version of the LM13700 so they are getting harder to buy. You can use a SOIC to DIP adapter board to fit a SOIC-16 LM13700M/LM13700MX chip into a DIP-16 footprint. There is also a clone of the LM13700 called XD13700 made by a company called XINLUDA that is still manufactured in a DIP-16 package.
...3.5mm jack sockets
mono and stereo jack sockets for your modules...