>Nobody's bothered to try to figure out how to create a
small-scale EMP without a nuclear blast
Additionally the US DoD has an EMP weapon that comes in guided missile form via Raytheon/Boeing Phantom Works' CHAMP (publicly tested in 2012, confirmed in operation thereafter [1][2]) for taking out buildings, power grids, and such. It can be discharged 100 times per sortie.
Targeting power grids 'the old fashioned way' in Desert Storm, Lockheed F-117As dropped a cluster bomb full of carbon graphite filaments (BLU-114/B). This shorted out power lines/transformers and destroyed 85% of Iraq's power grid. Later used in Serbia and accidentally in SoCal during testing [3].
"The idea for these soft bombs apparently grew out of a training accident in souther California. Military aircraft were dropping chaff - hundres of metallic strips used to confuse enemy radar. An airplane released its chaff near a power switching station and many of the strips fell onto a power switching station, blacking out a large area of Orange County."
- Weapons of Mass Casualties and Terrorism Responce Handbook - Charles Stewart MD FACEP