Link to Collect-Aire 1/48 R/WB-57F kit. Hope that it is useful.
http://www.cybermodeler.com/hobby/kits/coll/kit_coll_wb-57.shtml
Link to Modeling Madness review of Mach 2 RB-57F kit.
http://modelingmadness.com/scotts/korean/preview/mach2/019preview.htm
Link to Aviation Enthusiasts Corner page on the RB-57F.
http://www.aero-web.org/specs/margendy/rb-57f.htm
A painting, a line drawing, and a very rare photo of a PAF RB-57F. An even rarer photo of apparently an all black RB-57F.
http://www.aero-web.org/specs/margendy/rb-57f.htm
A link to a page on the Pakistan AF. Scroll down to the painting of the RB-57f being shot at by SAMs for some more info.
http://welc0m2myworld.blogspot.com/2010/01/part-8-pictorial-history-of-pakistan.html
A thread on Airline Pilot Central Forums on the black RB-57F photo. It is not the black RB-57D as opined by some. The last post on page two might be the best answer.
http://www.airlinepilotforums.com/military/47194-guess-aircraft-i-am-stumped.html
Here is a link to a site of B-57s in Japn. Hosted by geta-o.
http://members.jcom.home.ne.jp/at-yoshi/B/B-57/B-57.htm
Here is a link to Aviation Spector. The RB-57A with the red and white checked tsil is further down the page.
http://www.aviationspectator.com/resources/aircraft-profiles/martin-b-57-canberra-aircraft-profile
Best wishes,
Grant