For anybody that purchased the clutch master repair kits on ebay from that shop awhile back (which I forgot the name of at this moment), here are some pictures showing what I got. I finally decided to try to figure out which one was the correct one.
This is the correct one I believe:
The box says 26 03301 and the boot has FAG H 1750 on it.
This is one of the incorrect ones I got:
The box says 26 13301 and the boot has FAG H22500 and is obviously too small. As to what it is for, maybe it is for the very early clutch slave cylinder as Ray suggested.