Not sure how slim it is, but you may want to check out the Sig P239. Single stack and close in size to a Commander 1911. Additionally, its hammer fired.
"The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government." - Thomas Jefferson
OWN: G17 Gen 3, G19 Gen 4
SOLD: M&P 9 FS, M&P Shield, KelTec PF9, G27 Gen3