Extract specifically formatted string from a larger string

Also, is there an alternative to the Morefunc add-on for the following code: =REGEX.MID(SUBSTITUTE(A1," ",""),"[0-9][0-9][0-9][xX][0-9][0-9][0-9]",,FALSE)

I have Excel 2011 (mac) and Morefunc is for pre-2007