[Player1]

Для Excel есть

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);
}