Here is a BM-13N Katyusha on display at the Museum of the Great Patriotic War. It uses a Lend-Lease US-built Studebaker US6 as its base.
This M4 Sherman is on display at the Central Museum of Armed Forces of Ukraine in Kiev. It was knocked out by the Germans during the Great Patriotic War and recovered from a bog in 2004.
Here is a Lend-Lease P-39Q Airacobra at the Aviation Museum of Central Finland, shot down by the Finns during WWII.