You know, that can be arranged, likely. 
We did release this PRD for anyone willing to create a custom marketplace in the past but nobody came forward, so I’m definitely thrilled that this is happening. I am very glad that Venticello came forward with yet another elegant solution - on a personal level.
PS: This is the old PRD. It does need to be dusted off and updated but can tentatively be checked as a reference! At this point though, I would trust Venticello’s sense.