Yes, you can send a support ticket with the request, or you can directly go to:
add 20 of the one dollar custom pricing item, then proceed to checkout. During checkout you can leave a message saying this is for a Security 2.0 adapter.
The reason we don’t sell it separately is that similar adapter sold elsewhere is significantly more expensive (almost twice our price). We sell these as an accessory to customers who buy OpenGarage, and want to avoid customers buying it alone without OG.