Howdy from Texas! I got my Osmo and vehicle mounting kit last week. Last night the thumb screw that attaches the mount to the Osmo was lost. It fell out and now I need to get a replacement. I've google searches and used the DJI online "chat" but both were no help.

Anyone know where I can get a replacement???

Thanks,
Tex

Hello.
Sorry for the missing screw.
You may need to buy a new vehicle mount, then please visit the official online store: http://store.dji.com/product/osmo-articulating-locking-arm
You can also email to support.us@dji.com for help.

Thanks.

LOL
I'm looking for the same thing. Its cheaper (If we must buy a new component to cannibalize a thumbscrew) to buy the Osmo extension arm. It has the same thumbscrew.
However; Keep looking for the correct 1/4-20 thumbscrew.
Standard photography equipment without the famously bad DJI customer support.