Use the on-line random number generator at https://www.random.org/integers/ for example.
If you have an ordinary pack of playing cards, remove the K, Q and J of spades, shuffle them and cut.
Clubs A to K represent 1 to 13, Diamonds A to K, 14 to 26 (add 13), Hearts A to K, 27 to 39 (add 26) and Spades A to 10, 40 to 49 (add 39).
Alternatively, if you could lay your hands on a 49 sided die ?