Fifteen or so years ago, I was checking on the then web news of gun shops in the Philippines version of Khyber Pass gunshops.
Well I found two of these, if I remember right, call Tomgram, modified Thompson sub-machine guns on sale on the Philippine version of Ebay.
This is a picture of one, not from the original site, that seems to have survived as the picutres are gone and I no longer have the lap-top they were saved on.
They shorten the receiver put new stock and grips ons but the two that were listes beyond shortened receiver were not identical.
Back then there was an artical on them and some take drums and some do not.
Another one:
