Studiophile AV 40 Replacement Part: Push-Release Speaker Terminal

M-Audo AV-40 Replacement Parts Question:

I recently moved and in the middle of my move, the push release speaker terminals on the back of one of my AV-40's broke (the plastic clips got hit by something and snapped).

I was trying to find a replacement piece online/at a store. Can I purchase replacement pieces from M-Audio? I just moved to San Jose, CA.

If it helps at all, this is a reference image for what I am looking for:
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