Finn Juhl Spade Chair  

Hi,
I've been a reader of Design Addict for a while but this is the first time that I have posted in the forum. I'm hoping that your expertise might be able to point me in the right direction!
I have recently purchased a Finn Juhl Spade Chair online. Unfortunately, upon receiving the chair I discovered that the springs that support the seat have been replaced with bright orange rubber bands! The original springs are still in place on the backrest but these are quite worn. I've seen the clear/grey Expersprings but wondered if you had any suggestions for where I might find a replacement closer to the original brown.
Also, does anyone know the dimensions of the original cushions?
Thanks in advance for any advice that you might be able to offer.