If it was me, I'd write a letter/e-mail of introduction, rather than cold call or suddenly turn up as that can come across as confrontational, and could give the wrong impression.
In your letter I'd mention what you do, and how you could be of service to them. You could refer to some previous work you've done for other customers, and provide him with contact details, so it's kind of like a CV in that respect. Really sell your skills and such so that he'll have no option other than wanting to talk to you, but do not lie, that'll destroy your reputation in a heart beat.
I would NOT mention pricing at this stage! Instant turn off!
Also explain how you came to know what this person was after too, was it via a mutual friend, a business card, something you checked on their website etc...
You should get some kind of response, if not, then after say a week or possibly even two weeks, I'd either fire off another letter/e-mail (or possibly both in case of spam filtering etc).
I'm not sure if any of this helps, but in your situation, that's what I'd do.