Seemingly the plane went down in a lake - the Netherlands had a lot more water inland then than now. The Germans probably did not want to spend the resources to get it.
The real worst - however it did not make it in really large quantities due to the German invasion of France - has to be the Caudron C.714. The Finnish Ilmavuoimat received some and gave up on them, sos did the Polish suadrons that were given tho them in France after the invasion of Poland.
asisbiz always has some, also axis aircraft survivors sites and axis / luftwaffe sites. Here is one G2 in lithuania 1944.
www.asisbiz.com/il2/Ju-87/10(Pz)SG3/images/Junkers-Ju-87G2-Stuka-10.(Pz)SG3-(S7+BT)-Lithuania-autumn-1944-01.jpg
High wing load on the Me-264 (as seen when testing the V1) carried a host of problems in performance and handling abilities. This is the reason the Luftwaffe preferred the Ju-290. The Me-264 sahould have been refesigned, which in 43 was already a non-starter and led to the cancellation in 44...