Up, Up, & Away (Cheviot) has a bunch of blisters and individual minis from the GW Range including some older rare ones at reduced cost.
Eastside games and cards (Milford) has a good selection of the very type of minis you are looking for in Reaper, Warlord, & Confrontation!
SciFi City (Northgate mall) the last I checked stocked Reaper Minis
Gamesworkshop Store (Hyde Park) has a bunch of GW Blister packs for individual characters.
Happy Hunting!