[June 2021 pricing] GBP16+VAT for this simple adapter is ridiculous:
[July 2023 pricing] GBP23+VAT for this simple adapter is ridiculous:
https://uk.farnell.com/1540971Here is a gerber/drill ZIP you can upload to your favourite PCB manufacturer.
Parts required are:
6W SIL HDR, SULLINS PPPC061LGBN-RC, DIGIKEY S5481-ND
6W 6P6C RJ12, MOLEX 0950097661, DIGIKEY WM11184-ND
The board silkscreen has the pin functions labelled but beware these only apply to the target connection. If you are using this to adapt PicKit to RJ then the labelling is wrong (see photo).