Spare knobs for my UR 44

Hello guys,

I am a happy user of the UR 44 interface but recently I lost 4 of knobs that control the gains on the interface during a live show (I think someone may have stole them). I did not find any replacement so far on the internet or in a shop so I was wondering if you could help me or point me toward a reseller (I leave in France).

Thank you,

Mathias Gautier