This is the normal state of the job rather than an emergency: the show treats needing leads as constant. Panic is optional; the arithmetic is not.
Go back to the target list, about ten named companies plus the dream client, and work it with the two first moves the show names: email and LinkedIn messages. Then add the room. Industry mixers and conferences are where this sector's leads physically are.
Do not start with a new tool or a new list. You have a list; what you are short of is repetitions against it.
Source: Strategies for Lead Generation, episode 10 of the Oil & Gas Sales & Marketing Podcast.
Also: The Fundamentals. How to Add New Logo’s and Customers, episode 13.
The next step
If the way energy buyers actually buy is costing you deals, talk it through with ModalPoint, the go-to-market firm Matthew Bertram runs. A 30-minute discovery call: no scope, no commitment, and a mutual NDA before anything substantive. You get a reply within one business day, and the first call is with someone who works in the sector.