Are there any hosting providers that will truly accomodate raw disk (filesystem: ffs, etc.) images as opposed to proprietary image or container formats (Amazon'

Are there any hosting providers that will truly accomodate raw disk (filesystem: ffs, etc.) images as opposed to proprietary image or container formats (Amazon's, VMWare's, etc.), without having jump through numerous hoops? For the sake of example, say I already have my system built and configured just the way I like it, as a "raw" ffs image file. And FWIW the kernel on that image is multiboot compatible and can run as a Xen guest. I also have my own non-GRUB bootloader. But I realize that it may not be feasible for the hosting provider to let me use it.