This is the SPV atlas that covers Wisconsin.....Great Lakes West...
I wouldn't pay more than $30 for a copy, though.....often less at train shows, used book markets, etc.
If you're really interested, we (LHS) may yet have a copy of this volume. They had been available through Carstens Publishing,...now defunct...and we've not re-established a source as of yet. Other LHS's may be in the same pickle.
KD
BTW...some of the later editions of the midwest volumes, in particular, had been updated to include former interurban lines, also.......very nice touch!