And after searching through some pen sources came up empty... I found them on some warehousing and random stores.. And I found some more this morning at a reasonable price.
http://www.nationalcompsupply.com/pilot%C3%82%C2%AE-explorer-retractable-roller-ball-p-19013.html
http://www.e-rackonline.com/store/pens-refills/pilotreg-explorer-retractable-roller-ball-pen/35361/
No affiliation, and I don't know how many they have, Just passing along the info if you want to pick up a good pen.
Seth
