Connect Invision Store to External Site (Hubspot/Mailchimp)

Hi Everyone,

I am configuring my Invision Store. 

When someone purchases something from my Store (a ticket to an event I am running for my community), I would like Invision to update my Hubspot/Mailchimp so that I can automate a Welcome/Thank You email. This would mean that I can then email attendees information about the event etc.

The Zapier integration does not have any triggers related to the Store. Does anyone have another way to connect Invision to an external tool? My backup plan is to manually do it whenever someone buys a ticket but this is a lot of effort. 

My thanks in advance.

Thanks,

Nigel