Для Excel есть
X++:
boolean replace(int _workSheet,
str _range,
str _what,
str _replacement,
int _xlLookAt = #xlPart,
int _xlSearchOrder = #xlByRows,
boolean _matchCase = false,
boolean _matchByte = false)
{
COM range = this.findRange(_range, _workSheet);
return range.replace(_what, _replacement, _xlLookAt, _xlSearchOrder, _matchCase, _matchByte);
}