Just purchased those exact items from here:
www.shspowersports.com
PRODUCT INFORMATION:
Mfg Product Number: 250300045
Description: GOUJON DE ROUE *WHEEL STUD for Can-Am
Mfg Product Number: 705400013
Description: ECROU HEX. *NUT-HEX. for Can-Am
However, they are certainly NOT cheap.