What are the replacements for: 
- Sv 93 (SBS1939L, SBS1949H)
- Sv 123 (SBS8057K, SBS8067G)
- Sv 175 (SBS1911R, SBS1941D, SBS1967E)
For 123, it seems like there are more than 1 non WAB buses (DM
3500s in particular) running around everyday.
As for 175, it seems like those SP DM3500s from BBDEP are
replacing the slot.