Where To Buy Pen Springs?

[InterstellarPens]

The specific pen refill I'm using is the P900 Schmidt, which is measured at 3 7/8". I'm going to need to buy at least 100 of these springs at once. Any advice or direction as to where to buy such springs would be splendid!

[onotopen]

This site http://www.cultpens.com/i/q/SM16234/schmidt-9000m-easyflow-pen-refill has Schmidt P9000, probably same product but updated numbering system. It says it's the same as standard Parker G2 format Length 98mm, Dia 6mm;

 

98mm equates to 3 55/64 inches, just 1/64 shy of your 3 7/8 inches...maybe within your measurement accuracy ?