Need help with slave cylinder

The other day on my way to work I heard something hit my floorboard, turns out it was one of the bolts from where you bolt the slave cylinder. So i bought a new slave cylinder but I cant install it because im missing the bolt and the other bolt doesnt seem to tighten anymore. Could anybody point me in the right direction as to where i can get some replacement bolts?
And is there a easier way to disconnect the line from the slave cylinder? I almost busted my knuckles trying to take it off

I've always loosened the line fitting (using a metric flare wrench) BEFORE unbolting the two mounting bolts.

If the slave cylinder bolts themselves are bad, you can typically find lots of metric stuff at Ace Hardware, usually more than at HD or Lowes. If the threads in the transmission housing are bad, you may need to drill and tap to the next largest SAE or metric size. Or maybe install studs with Loctite Red and use nuts.