Looking for a 4" to 6" barrel shroud far a bull barrel

[Goggles pizzono]

I have an sr22 with a threaded bull barrel, I would like to put on a barrel shroud that is 4" to 6" inches that would go into the handgaurd and give that short barreled suppresser look. I know spikes tactical makes some but I don't think they don't fit a bull barrel. Any suggestions who would make one or where I could get one made?