yeah all you need to do is just add your specific requests in the comments box when ordering, or reply to your confirmation email and they'll take care of you.
Another +1 for the RY bridge here. It's everything nolly said it is and I couldn't believe it wasn't ceramic because of how tight it was. Not quite sharp and compressed enough for me but it can do anything and then some, very lush and juicy sounding in the mids and the highs are just gorgeous. The RY neck is probably my favorite neck pickup at the moment, matches up fantastically with the aftermath bridge and makes a great set with the RY bridge too, should you choose to go for something a little hotter.