Display an integral value in separate textures of digits. Untested.

Digits.cs

Texture2D[] m_Numbers, m_Digits;

void SetValue (int value)
{
	if (value >= Mathf.Pow (10, m_Digits.Length))
	{
		Debug.LogError ("Value overflow: Unable to display value: " + value);
	}

	for (int i = m_Digits.Length - 1; i >= 0; --i)
	{
		int step = Mathf.Min (Mathf.Pow (10, i), 1);
		m_Digits[i] = m_Numbers[value / step];
		value %= step;
	}
}