Ask HN: Outsource cold email outreach list?

Received wisdom teaches us that cold emailing lots of potential customers is one of the best ways to get a b2b project off the ground. But I feel like building a 100 person email list is one of the tortures of the damned.

Has anyone tried outsourcing the dirty work of searching LinkedIn and Google for decision makers in your target market then tracking down their contact info? If so, can you suggest any strategies for success?

Note here that I'm excluding the higher value work of understanding the contacts needs and doing the actual personalized communication.