I recently made my own oil lines for my T500 using available check valves and pneumatic quick connect fittings I used 4mm nylon piping with some y couplers and made some adapters to go on the valves and the banjo connectors on the pump with M5 inside thread to connect to the pipe connectors and a 3.5mm hole to solder on the valves. These adapters were soldered onto the valves and the banjo connectors with future servicing in mind.
Suzuki part numbers are
Valves--16710-94502
Banjo connector--09363-02002
Both are available from multiple sources.
Here is the bike just after a bath
![up :up:](./images/smilies/icon_thumbup.gif)