Turning a back brake into a front brake

Sure this has been mentioned before some place, but I can't for the life of me find it.

I have to work with, one very bent front brake (with good bolt), one perfectly good back brake (with back brake short ass bolt). Can you guess where I'm going with this?

How do I turn the whole into more than the sum of the parts and end up with one useful front brake?

EDIT: I have tried taking it apart and unscrewing the bolt from the front, and taking out the grub screw and unscrewing the bolt from the back using the small allen hole.

What kind of brakes are they?

Campag chorus dual pivot, few years old.

how long is the front nut? most of the time you can just use the front nut on the rear and it will work depending on the forks.
this is all you need to change

how long is the front nut? most of the time you can just use the front nut on the rear and it will work depending on the forks.
this is all you need to change

They both have the same short nut, so I will need to change the bolt unless I can get a nut the the full length of the fork depth.

whilst searching for a long nut, I found this

which gives me enough ideas of what else to try.

seems alot more complicated and expensive to go the other way.
the long nuts are pretty easy to come by.
I've got a spare if needed
Or im sure BLB will have them for £10

Ask for bolts for bladed carbon forks.
Condor should sell them 12/14mm.

how long is the front nut? most of the time you can just use the front nut on the rear and it will work depending on the forks.
this is all you need to change

where can I buy some of these?

Ask for bolts for bladed carbon forks.
Condor should sell them 12/14mm.

Sorted (hopefully), thanks, just ordered a 22mm and 30mm from some random ebay dude.
Cheers

this is all you need to change

EPIC FAIL. swap the brake pads around or else they'll slide out the minute you use them