Your search for "cross ballpoint" revealed the following:
Waterman - Refill Maxima Black Fine Point Ballpoint Pen
$ 8.50For use with Waterman ballpoint pens Black ink Fine point Refills measure approximately 4.5 inches long
Pilot - Refills - Black - Medium Point - Ballpoint Pen
$ 2.50Fits Dr. Grip Center of Gravity pens.Fits Dr. Grip Center of Gravity FullBlack PureWhite Axiom and Pilot Metropolitan Ballpoint Pens....
Pilot - Refills - FriXion Red - 3-Pack - Fine Point - Ballpoint Pen
$ 5.17FriXion Erasable Ink Refills Fine (0.7mm) 3 pack red
Aurora Refills - Thesi - Black - Medium Point - Ballpoint Pen
$ 12.00Special Thesi refill specifically for the Aurora Thesi ballpoint pen.
Sheaffer Black "K" Type Medium Point Ballpoint Pen Refill
$ 6.50Sheaffer standard (K type) ballpoint pen refill for Legacy Heritage Balance Intrigue Agio Agio Compact pens.
Montblanc Refills By Monteverde - Ballpoint Pen - Purple - Medium Point
$ 7.00Sold Individually To fit Montblanc ballpoint pens. The Monteverde Soft Roll offers: Latest technology for the smoothest writing experience. Low...
Waterman Blue Medium Ballpoint Refill
$ 10.30For use with Waterman ballpoint pens Blue ink Medium point Refills measure approximately 4.5 inches long
Pilot - Refills - FriXion - Black - 3-Pack - Extra Fine Point - Ballpoint Pen
$ 5.17FriXion Erasable Ink Refills Extra Fine (0.5mm) 3 pack black
Aurora Refills - Thesi - Blue - Medium Point - Ballpoint Pen
$ 12.00Special Thesi refill specifically for the Aurora Thesi ballpoint pen.
Faber-Castell - Refill - Ballpoint - Black - XB
$ 4.40Refill for Faber Castell ballpoint pens except TWICE and TRIO Magnum refill with steel tip, Also suitable for carbon copies...