No clutch at all!

I've been having to top up my clutch fluid slowly since I bought my bike last year so decided to take the slave cylinder off to see where the fluid is going
I couldnt see anything out of the ordinary so put it back on and decided to live with it but after doing so I had no pressure on the lever
I tried to bleed, took it off and put it back on again, tried to pull the fluid through and all nothing!
I've had the master cylider off and apart..... nothing!
I was going to buy a repair kit for both but will other master cylinders fit (other than Brembo Steve!) such as later Fireblades? Has anyone heard or tried anything else?
Slave cylinder's are no problem as theyre the same as Firestorm's, Blackbird's, VFR800's and the NR750!!!
Cheers in advance guys!

I couldnt see anything out of the ordinary so put it back on and decided to live with it but after doing so I had no pressure on the lever

I've had the master cylider off and apart..... nothing!

I was going to buy a repair kit for both but will other master cylinders fit (other than Brembo Steve!) such as later Fireblades? Has anyone heard or tried anything else?
Slave cylinder's are no problem as theyre the same as Firestorm's, Blackbird's, VFR800's and the NR750!!!
Cheers in advance guys!