One of the ways would be to do an Internet search for suppliers of the above software and contact them for quotations. The rest involves a cheque book, an envelope and a postage stamp.
Be aware that, unfortunately, Nigeria has a reputation for being the home of various Internet scams and the above technique, though a little long-winded compared to Internet-based methods of payment, will certainly yield results.
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"Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856