By mid 1843 most B-17s had been withdrawn from the Pacific. They were needed as replacements in Europe.
A/C on hand vs Germany Table 88
The highest number, 1st Line, March 1945, 2891 B-17s, 2181 B-24s
In April 1945, there was 2355 P-47s, 2455 P-51s.
A/C on hand, ETO Table 89
A/C on hand, MTO Table 90
http://www.dtic.mil/dtic/tr/fulltext/u2/a542518.pdf