Where to get a new ratchet for my Northwave Aerlite SBS road shoes

[mcbird]

Had a bad crash in a race last week and my blue and white Northwave Aerlite SBS were damaged. The shoes have a ratchet system on the top strap and this buckel has been completely wrecked. The shoes otherwise were not damaged.

Can i get replacement ratchets for the shoes?

Where is the best place to get them?

Thanks.

Garreth