I know of no bait shops within 100 mi of your location
that would be rasing their own crappie minnows.

Most all minnows used around here are from Arkansas or Missouri trucked weekly
to various commercial retailers/distributors

Most are of the Missouri minnow strain
Some shops have the "bull nosed minnows" and / or Tuffies strain.
Some shops at various times of year will carry the Orange minnow - mini gold fish


Some shops will sell minnows by the wgt -ie: 1/4 - 1/2 & 1 pound
A lot sell by the dozen only.................
Do to life expectancy of minnow during summer months - most will be above average 1 1/2 inch size - as fall sets in - some shops will go to small - med & large crappie
minnows.

Size of minnow used is mostly based on what the fisherman feels comfortable with
and how it is going to be used - cork/bobbered - spider rigged - long-lined -etc

Most bait shops carry Live shiners - wild & domestic for Bass fishing - which are
way to large for spec fishing.