That common name is usually applied to various members of the genus Opistophthalmus, and sometimes even certain Pandinus. O. species of one type or other are often available, although determining exactly which species it is may not be so easy. Still, they're large, attractive scorpions and well worth keeping regardless of which one you end up with!
You can find some scorps listed as tricolor burrowing. O. glabifrons (confirmed species) over at invertepet.com, check out exopets.com for one listed as O. walbergi (probably not actually walbergi, but still an Opisto) though no pics posted (Paul is a good guy though), and check out intenseherp.com for O. ecristatus (not sure on the species, though it appears similar, as O. ecristatus is usually lighter colored). I have been unsuccessful at locating a shop who has pics posted of the exact ssp. of the one listed on the thread here.