I think your best bet is to try to get access to the IP as *soon* as it becomes available.
To that end, note that most venture-funded companies go through a state level shut-down process called ABC (Assignment for the Benefit of Creditors). It's a cheaper, friendlier way to shut down a company than going through a federal bankruptcy process.
There are a handful of larger firms that do a ton of work in this space and their responsibility is to maximize value of the company's assets to satisfy creditors and investors. I *assume* they've got a list of people who are generally interested in purchasing certain asset types and they blast out to this list for every new engagement. Get on those lists. Also talk to them about the idea... certainly they'll have a good perspective on this - whether a marketplace model would work or perhaps a more tightly-controlled model that syndicates to a private community of investors.