The following is from Junkers Ju 290, Ju 390 etc. by Heinz J. Nowarra.
Using information from the book, looks like there were either 10 or 16 A-7's built.
Picture shows the first A-7 as Wnr. 2900181 KR+LL, Text shows the first A-7 as Wnr 2900186 KR+LL.
Book also states the last A-7 as Wnr. 2900196 (FE 3400) which was captured at the end of war and flown to the US.
Some A-7 pics and info. here. Maybe you can piece together what you need.
http://www.luftarchiv.de/index.htm?/...kers/ju290.htm
http://www.geocities.com/hjunkers/ju_ju90_a1.htm
http://www.zonamilitar.com.ar/foros/...ad.php?t=16467
http://forum.keypublishing.com/showthread.php?t=40070
http://forum.12oclockhigh.net/showthread.php?t=17306
Here's a book on-line, page 201 talks about the Ju290 A-7
http://books.google.com/books?id=oB9...esult&resnum=6
Regards,
Mike