Outer Limits 4x4 Board

i was wanting to know what air boxes people are running when they drop in a ls1 in a gu. i currently have the 4.5l air box that sits half way up the guard that i want to ditch so i can fir a 2nd battery, ive been trying to find a gu air box that fits behind the headlight, but it seems they are as rare as hens teeth, i was just wonder what alternatives are out there, it needs to connect to a factory snorkle.