Herp/ Reptile Shows. -Exotic Rodents

I was wondering if you would be able to find exotic mice/rodents at herp shows? I have been searching for Egyptian Spiny Mice and Zebra Mice (Striped Grass Mice) for a while now and i have been unable to find anyone with these in my area. MD/PA. I know there is a herp show down in southern md almost every/every other weekend and didnt know if i might be able to find them there. or does any one think a petstore would order them for me?

Thanks!

Sorry if this isnt in the right section....