[arch-general] virtualbox-modules-lts?

I see there's a virtualbox-modules package, but that's for the mainline (3.2 series) kernel. I don't see a similar package for the LTS (3.0 series) kernel. Does one exist somewhere that I'm missing it? If not, how does one use virtualbox on Arch with the LTS kernel? Do we need to build the kernel module from source by hand? Thanks, DR