While not a dedicated 8th AF museum, the Flixton Air Museum:
www.aviationmuseum.net
has quite a lot of 446BG and 8th USAAF material.
Similarly, the City of Norwich Aviation Museum at Horsham St Faith, on the N side of Norwich International Airport, has a display on the 458BG who were based there.
Not wishing to appear territorial, but the aforementioned museums at Parham, Leiston, Holton (Halesworth) and Flixton (above) are all located in the county of SUFFOLK. The original poster asked about museums/displays in NORFOLK.
BC