Some pictures attached:
1) the bracket should be straight, take it off and bend/whack it back into shape
2) the lower bolt (the one that broke) is only to set/adjust the tension, it should only be turned when the other 2 bolts are loose (To allow the pump to pivot). I would recommend getting hold of another, as a traditional bolt maybe too short to safely set the tension or get enough grip on the threads without pulling them out.
3) the bolt should be quite long, about 2 inches total (with a domed end to aid locating)
these are from my h22a8 manual original.
hope that helps! If you've stripped the part that the troublesome bolts goes into, hot tip, loosen the big bolt (by the loom) and rotate it around 180 degrees. You'll catch the good threads first then the protruding bolt should clean up any damaged threads. Dont forget a little lubrication and be gentle!
I checked and i do not have a spare bolt - i sold the last PS pump complete... Can't remember to who, but someone should have one. If not lings parts might have one.