Alain,
Perhaps check this website as well what units were transported on what day:
https://www.ww2gp.org/serials/hollandSerial.php
If 1/401 GIR on 19 Sep 1944 in your question, then serial A-73 flown by 435th TCG according above list. Losses refer to C-47s, not gliders.
From another source:
Serial A-73 - 435th TCG.
I]"31 aircraft and 30 gliders. 25 gliders released on LZ "W" at 1444. 6 gliders aborted account weather. 3 landed on continent. 2 landed in channel and 1 landed in UK. 1 aircraft failed to return, 2 aircraft damaged by light to medium flak and ground fire. Results successful."[/i]
Also see, although not the one(s) you're looking for:
https://www.hangarflying.eu/erfgoeds...van-waco-cg-4/
In online book
Market Garden Then and Now by Karel Magry it says that Waco 43-19872 of Serial A-73 came down near hamlet Asbeek near Asse, "
one of three of this serial in Belgium".
However, Joebaugher has this one in 436th TCG on 19 Sep 1944, which would make it Serial A-76...
Groet,
Leendert