First of all you can check the name of the part with the attached picture.
We sell a small range of parts at Burton.com so you might be lucky and find what you need there. If not, Authorized Burton Dealers usually carry some spare parts.
If you believe that the part should be covered under warranty (within the warranty period with proof of purchase) then please take your binding to your closest dealer for an appraisal or contact us at 1-800-881-3138 for a replacement part.
Smaller wear and tear parts like sliders, tongues or buckles can often be replaced directly by our Burton Guide team.