Sorry but I doubt it. Although it looks the same the internal machining is different. the main being the lower tube doesn't have the sear slot and is sealed for approx. last 1.5" as it part of the gas supply to the solenoid. The grip frame also is different in a few ways.
You would or we would have to supply a new body , grip frame , battery box , Vert. reg. , LP reg. , bolt , diadem mid-rise feed neck , and asst'd fasteners. By time we retro-fitted a TS to a diadem piece by piece it'd be more than buying new.
we are working on a holiday special Sentinel TS w/ some great aftermarket parts. Stay tuned in this forum for an announcement next week.