"A take down Savage 99 in 308" gonna be looking for a long time, Savage never produced these. The takedowns only exist in the short version, Savage had to stretch the action a few hundredths to get the longer .308 to eject when unfired. Thus, your only options are 250 3000, 300 savage, 22 Hi power, 303 savage, 30 30, 32 40, and perhaps 38-55.
My holy grail might be a .358 lever safety safety 99.
a mini uzi with a can could be it too
an NIB MG 34 would be pretty high on the list.