If you want to bolt it, it's fiddly but not hugely difficult.
1) driver's seat out
2) driver's glovebox and the plastic panel under it come out. The glovebox just pulls out, the panel has 4 screws.
3) By now, you can see the entire clutch pedal arm and the pedal box. Note that the pedal arm pivots on a bracket which is (was) welded to the pedal box. This is where, on mine, it failed.
4) On the back of the pedal is a white lug which is actually the end of the clutch cable. This comes off and means you can move the pedal without the tension of the cable.
5) position the bracket into the place it should be (if the welds weren't broken). The bracket goes behind the main pedal box. Clamp it with a small g-clamp or some vice grips (mole grips). There's really only one place to put a bolt - this should be fairly obvious.
6) Drill a hole through the two clamped pieces of metal. Leave the clamps in place.
7) Now for the task of putting the bolt in. I used an M4*12mm allen head bolt with a nyloc nut. The bolt goes in first (upwards). Now you have a bolt in there but the nut still has to go on. This is the trickiest bit, it may take a couple of tries.
8) (This is just what worked for me) Put a bit of double sided tape on the end of your finger, and stick the nut to it. You'll see why when you get there, it's a really fiddly job and there isn't room for two fingers. With an allen key in the bolt, rotating, try to get the nut to engage with the bolt. It won't be long before it pulls away from the tape. Now get a spanner in there, on the nut. It will probably fall off a few times. Once that's on, you can start to tighten it. Don't over tighten it, the bolt will shear and you're back to number7).
9) Reconnect the clutch cable. The pedal bracket will still move a little, I don't think there's much you can do about that. Replace the plastic panel, the glovebox and the driver's seat.
10) Done!
Edited to add: The bolt eventually fatigues and snaps. I found it lasted about 6 months, I know some people's lasted a lot longer.