Hello Paul,
Found the following in the Waybackmachine, the now sadly unavailable HugoJunkers homepage site.
what follows is perhaps confirmatioon of the night fighter type as you say.
J88-710891, Ju88 G1
LUFTWAFFE, 3C+HM, ??.??.?? to Dez.44, missed while with II. NJG4
J88-711299, Ju88 G1
LUFTWAFFE, 3C+GN, ??.??.?? to Dez.44, missed while with II. NJG4
J88-712384, Ju88 G1
LUFTWAFFE, ??+??, ??.??.?? to Dez.44, missed while with III. NJG4
J88-714045, Ju88 G1
LUFTWAFFE, 3C+EM, ??.??.?? to Dez.44, missed while with II. NJG4
J88-714811, Ju88 G1
LUFTWAFFE, PW+BC, ??.??.?? to Mai.45, captured at Aibling by USAF after landing gear collapsed
J88-714830, Ju88 G1
LUFTWAFFE, 9W+Q0, ??.??.?? to Jan.45, lost during mission
at -
http://web.archive.org/web/200910252...ju_ju88_p2.htm
Also here is perhaps another Luftwaffe site you might try -
http://www.luftwaffe-research-group.org/index.php
All the best
Alex