S7726 shared his Mouser part order for the Soldering Iron Driver v1.5. This board is still under development so we haven’t yet decided on all the parts we will use. One thing to note is to follow the partlist on the project page, as the schematic has some errors in component values that will be corrected shortly.
I ended up looking on mouser. I went with 1% for a lot of the resistors because they were cheap anyway. For the Headers I just tacked on a strip of 36 SIL for each line item (You can never have too many). I plan to use 2xSIL out of the extras for the DIL. This might be something to change for throwing it out to the masses.