I'm not entirely sure which 'Morgan and Morgan' you specifically refer to. There could be many entities with such a name. It could be a family-owned business, in which case the back story might involve a family starting from humble beginnings, gradually building their enterprise through hard work, determination, and perhaps some unique business ideas. But without more context, it's hard to be more precise.
The easiest way could be to subscribe to comic book subscription services. They'll deliver the TWD comics to your doorstep regularly. Another option is to check out conventions or comic fairs where you might find special editions or rare copies.