Did you ever find anyone to do this project for you? We are looking for a similar solution to connect BP and HS and I'd love to connect to learn how you pulled it off, if you're willing to share?
I know I am a bit late to this, but if you are still looking for someone to help out with this, feel free to check out our website: https://www.saltedstone.com/ we are a diamond partner and have done many integrations between HubSpot and many various other platforms.
We would love to help. Our computer engineers and developers love these kinds of integrations. We do these kinds of projects with fixed pricing and endless support.
We're a Platinum HubSpot partner based in Norway with a highly technical background. We've spesialized in creating seemless integrations for HubSpot.
We have experience from your industri as well and we're currently working with a simular case for LS Retail.
Would love to setup a call with you and my CSO (Andreas) to get deeper understanding of your needs and to see how we could best help to solve them.