Looking for a way to concatenate a list of customer contact emails for a quote

I have a MT-SaaS customer that would like to use Breaking/Routing rules to send out Quotes to multiple addresses.

I would like to assemble a list of email addresses for each of the customer contacts associated with a quote. Usually 2 or 3 people.

I am struggling with how to do this. If I had custom code for the BPM’s I could do this. However, as a MT-SaaS customer that is not available.

I do have BPM"s but I’m not sure if that can be done with just BO’s?

If anyone has a suggestion - I would greatly appreciate it.

Thanks,
DaveO 651-246-3281