Boom arm extension?

[HoneyBooBoo]

I have a fairly wide desk at 90cm and I also have a boom arm that I want to be able to place on the back of my desk rather than the side of my desk. I was wondering if there is a boom arm extension that I can buy to make my current boom arm longer or a way I can mod my it to make it longer. Currently it is only ~70cm and it would need to be nearly double that length for it to easily reach over my desk and monitors. I have been told that I should attach my boom arm to my monitor stand, but unfortunately I have a gas spring monitor arm that is too thick and inconvenient, so I'm not sure what to do. 

Any suggestions are appreciated, thanks. 

[GOTSpectrum]

19 minutes ago, HoneyBooBoo said:

I have a fairly wide desk at 90cm and I also have a boom arm that I want to be able to place on the back of my desk rather than the side of my desk. I was wondering if there is a boom arm extension that I can buy to make my current boom arm longer or a way I can mod my it to make it longer. Currently it is only ~70cm and it would need to be nearly double that length for it to easily reach over my desk and monitors. I have been told that I should attach my boom arm to my monitor stand, but unfortunately I have a gas spring monitor arm that is too thick and inconvenient, so I'm not sure what to do. 

Any suggestions are appreciated, thanks. 

Couldn't you screw a piece of timber to your desk and attach the arm to that? 

[HoneyBooBoo]

1 hour ago, Ben Quigley said:

Couldn't you screw a piece of timber to your desk and attach the arm to that? 

I was hoping to find a more elegant solution if possible.