Is replacement lead for the compass contained in the Westcott Math Set #15420 available for purchase?

Acme United Westcott does not sell the lead for the compass in the math set item 15420. 

However 3 lead (graphite) tips are inside the 15420 package, including the one already in the compass. 

Replacement lead/graphite inserts for professional drawing tools  have a standard diameter, varying only in the length.

We recommend consumers shop at Amazon and search for "compass lead refills" The standard size if 2mm diameter by 3/4 long .