Your search for "waterman ballpoint" revealed the following:

Aurora Refills - Wagon - Blue - Medium Point - Ballpoint Pen

Ballpoint Refill for Magellano.

Lamy Refills Black Broad Point Ballpoint Pen

Fits Scribble Pico Pickup or Agenda pens.

S.T. Dupont Soft Roll Ballpoint Pen Refill by Monteverde - Black - Medium Point

Monteverde Soft Roll refill transforms the ballpoint pen into a miracle of writing technology! The latest break-through in ink technology...

Pilot Refills Blue - 2 Pack Fine Point Ballpoint Pen

Refill fits the following retractable pens: Dr Grip ball point EasyTouch Better Retractable

Pelikan - Giant Blue - Fine Point - Ballpoint Pen - Refills

Solid Stainless Steel Tip Pelikan Giant Refill 337 International Format Colors: Blue, Red, and Black

Pilot RF15 - Ballpoint Pen - Refill - Black Ink - Fine Point

From a culture that has revered the art of writing for more than a thousand years comes instruments and accessories...

Pelikan - Giant Black - Medium Point - Ballpoint Pen - Refills

Solid Stainless Steel Tip Pelikan Giant Refill 337 International Format Colors: Blue, Red, and Black 

Lamy Refills Blue Broad Point Ballpoint Pen

Fits Scribble Pico Pickup or Agenda pens.

Aurora Refills - Mini Black Medium Point Ballpoint Pen

Cross Blue Selectip Jumbo Medium Point Ballpoint Pen Refill

Jumbo ballpoint refill for all Cross Selectip pens. Suitable for general purpose writing highly reliable and convenient for use on...