The stone porch on my home is unstable because vertically placed stone has buckled. Can the porch be rebuilt?

Question:Would the whole porch (held up on 3 sides by these stone blocks) have to be torn down and dismantled or can one wall at a time be replaced with new stone and the porch surface and top remain?
Any other advice or direction who to call, who does this work?

Answers:
The roof could be held up by temp braces while repairs continue.
Who you need is a stone mason, one who specializes in stone work. The yellow pages would be the place to begin your search, along with talking to other masons you may see on new construction sites.
Ask them who they know that does stone work, word-of-mouth advertising is a very powerful tool!