Hi the bulbs are called capless bulbs,not sure if you can get 10w ones though.You might be able to get a different wattage flasher relay.
Has the clutch suddenly gone like this or has it got worse over time?Have you checked to make shore that the slave cylinder is not leaking(common fault)One other thing is to make shore the clutch is not clogged up with dust if you are running a closed cover.Hope this helps a little,i am shore shazam might have the answers for you though.
Matt