hope this can help you :
no too difficult method
but must buy some tools
1.)buy modeling drill , which can use a very little drill head for thin prastic broad
2.)buy some thin metal rod
the most difficult part is drill the very accurate grip for each little hold
between the two parts
I suggest use a ruler and ink pen to mark the grip first
than drill it carefully
than use the metal rod to join the two parts
don't forget to use the super glue ~
here is some demo pic for you
I think this method is suitable for your case
(and sorry for my poor english )