Converting binary sid's to a hex string

[LittlePython]

I  am trying to create a hexstring of a NT4 user account sid which I can in
turn use to query an exchange 55 database. I believe I need to convert a
binary sid to a hex string. ADsSID com object will do this for me however it
is a little slow. Can anybody point me in the right direction to converting
a PySID to a hexstring.
Thx

import win32netcon
import win32net
import win32security
def report():
    resume = 0
    while 1:
        filter = win32netcon.FILTER_NORMAL_ACCOUNT
        data, total, resume = win32net.NetUserEnum('nt4pridc1', 20, filter,
resume)
        for user in data:
           MySid, string, int = win32security.LookupAccountName('nt4pridc1',
user['name'])
           sString = win32security.ConvertSidToStringSid(MySid)
           print MySid
           print sString
        if resume ==0:
            break

report()
## sString prints = S-1-5-21-357043131-537017027-1947940980-1289
## MySid prints = PySID:S-1-5-21-357043131-537017027-1947940980-1289
## I need  this , I believe this is a hex string of the SID
##  010500000000000515000000BB0B4815C33A022074381B7409050000


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