Is this consumer or corporate versions. If consumer cannot you buy it online?
I am checking around while waiting your answer. There are 4 suppliers of corporate programs in Nigeria a google search at least shows that.
This is the page you want i think: http://www.mcafee.com/us/purchase.aspx
If you use the drop-down menus this comes up: (Click to enlarge picture if necessary)
You might want to play around with that page as I see different companies come up depending on the search criteria.
The above was the only one that came up for distributor though.
I know that in South Africa at least, Digital River is the distributor for retail products, so you will have to do ask the company above about any particular product as there probably are different people for retail (Consumer) and Enterprise (Business) products.