Allen Engineering has produced an 04+ supercharger but it is not yet available to the public. I have not read anything about it being sold commercially with in the next year. Maybe try emailing AE and see what they have to say.
the OP could always swap to a 5.4 if having more options was so important
ive got an 08 4.6L and was looking at the sts turbo. how much would a swap for a 5.4L cost me. for that matter how much would it cost to have one buil with the options i want, i.e. bigger cam and heads.