look for a schneider symmar convertible maybe the 135 / 235 or a 150/265
they aren't wide and with the front cell off they are long and have a nice softness opened up.
make sure you have enough bellows, the FL are deceptive, while they are 235 and 265 it takes more bellows
than that at infinity because the nodal point is further than a "normal" lens
good luck !