My plants are too tall! PLEASE HELP BEFORE ITS TOO LATE!!!!!

My plants are only 2 weeks into flowering and they grew way taller than I had expected. There is only 1ft4in left space between them and the reflector which is way to hot for buds to do good in, and the only fan I got going is blowing over the top of them.
What can I do to fix this? I am getting tempered glass to put in the reflector but how should I do the ducting and the fan connected to the ducting? I have never set one up before nor seen one set up.
Is there any another way to fix this problem other than stated above?
PLEASE HELP! I only have 2-3 weeks left untill they hit the reflector and then....I am done for

I'm not too sure on ducting cuz i grow cfl but my most useful technique would be to LST it. You'll only need some string and some thumb tacks or small wood screws. My current baby is a 7-9 week plant at week 6 now, i had to tie her down twice from growing into my 3 65w(=300w incandescent) bulbs

How tightly should I tie them down? And they are in flowering do you think its too late?

Tying them down causes almost no stress if done gently. Just make sure to try and keep from blocking any nodes from light when you move it.