"We could probably find something we could. Purchase," Winter suggests, eyes narrowed. "Just for us. Me, you, Steve. Kate. Maybe Cortana. A couple others, if you want. Just for us, that ADI doesn't know about."

He has no idea how to find bugs just for purchase. If this were a universe with HYDRA in it, there'd be bugs in safehouses, and he'd just go rob one of those... but this isn't a universe with HYDRA in it. Which is a good thing! Just briefly inconvenient in this one fashion. Maybe Yelena will know how one purchases surveillance equipment.