The new mags from the Micromax MIGHT work, and might not.
Mine was made in 1943 for the Spanish Police, and is a complete replica of the 1911, right down to the barrel link, bushing, sear, mainspring housing, and mag catch. It fires from a locked breech.
This series of pistols has changed through the years; now it's no longer locked breech, and I'm not entirely sure what it's innards look like nowadays.
You could always take your older one into a gunstore and see if one of the mags from the newer gun fits ok, or if the notch is in a different place.
Flyer