Strangely enough, it's probably easier for you to go over 4.56 than it is for me. When I was sniffing around for 5.13s, I found out that everyone had them in "thick" gears (what you need on a 4.10 carrier). But I couldn't find them in "standard". I had several (including Randy's) tell me to switch to a 4.10 carrier! One place claimed to have "OEM gears" but I have no idea whether that was real or not.