I'd send C2 an e-mail with your picture attached and see what they say. If you just call it may be hard to explain exactly what the situation is, unless this is an issue that they're already quite familiar with.
Good luck
US and Canada Phone, Fax and Email
Sales and Customer Service: Toll-free 800.245.5676 or direct 802.888.7971
Fax: 802.888.4791
Emails: Oars, Indoor Rower, SkiErg, BikeErg and General Inquiries:
info@concept2.com