LBP Rallye question

My son has a 74 Dart Swinger. We are putting together a complete set of Rallyes for it. Bought some great 14x5.5 wheels on this forum and just recieved shipment on trim rings that look amazing on them, again found from someone on this forum. My question is in regards to the center caps. Being a 74 it should have the larger center caps and not the small cones, but they come in both dark and light. The repros I'm finding have the LBPs in light and the SBPs in dark. My son likes the dark ones. Did they originally come in a dark for a LBP? If so, has anyone seen any repros, or better yet, have an original set for sale?
Thanks,
Mark