Quoted from Lostcause:

I recently bought a set from Pinball Center, I was not happy with them. Colour was off and I had to mess about with holes and cutting the large back piece, sling shot holes were also too big and allowed the nut to fall through! Protectors sorted it out though. Look ok because all plastics were changed.
I hope your sets blue colour matches the back piece and the speaker panel piece or will look off.
Will have to check your website out. Good to have another source.