Hi,
Don't worry about driving your car with the failed transmission pump,it will be fine. I drove mine for about 6000 miles before I resolved the pump issue.The hybrid battery charged just the same, as this is from the alternator, so it will always stay at the same charge. The hybrid system still works, it is just limited in its functionality. After all, as there is no mechanical reverse gear on the car, the hybrid motors still let you reverse your car electrically.
The only real difference is that the car can't change to its high ratio, as it needs the pump for this, so you cant go above 80mph. Also, you won't have much power from standstill until the engine revs, as it relies on electric power to give you the low end power (especially when setting off up a hill).
Don't worry about it, just order your bearings continue to drive it and then fix it one weekend when you get round to it.
Giles.