Change your (16-bit) ints to (8 bit) bytes - save half your memory!
byte readvalue;
// Buttom right
int ledMatrixA[8][9] ={
{B11111110,B10000000,B01000000,B00100000,B00010000,B00001000,B00000100,B00000010,B00000001},
{B11111101,B10000000,B01000000,B00100000,B00010000,B00001000,B00000100,B00000010,B00000001},
{B11111011,B10000000,B01000000,B00100000,B00010000,B00001000,B00000100,B00000010,B00000001},
{B11110111,B10000000,B01000000,B00100000,B00010000,B00001000,B00000100,B00000010,B00000001},
{B11101111,B10000000,B01000000,B00100000,B00010000,B00001000,B00000100,B00000010,B00000001},
{B11011111,B10000000,B01000000,B00100000,B00010000,B00001000,B00000100,B00000010,B00000001},
{B10111111,B10000000,B01000000,B00100000,B00010000,B00001000,B00000100,B00000010,B00000001},
{B01111111,B10000000,B01000000,B00100000,B00010000,B00001000,B00000100,B00000010,B00000001} };
// only you can find these...
byte x = firstIndex;
byte y = secondIndex;
readvalue = ledMatrixA[x][y];
// use readvalue for whatever you want...