Just a starter for now, but a wireless mini keyboard attached to my aerobars has worked well for years of PC use.
As mentioned in those posts and elsewhere, I do a lot of PC use during endurance level workouts. Anything above that is questionable for quality, so I reserve anything important for long recoveries or off-bike work.
ETA: Link for my current keyboard, that has been in service for nearly 3 years. Works great.