I'm an ear player, but we do have downloadable tabs right here on this site! I went to the downloads and found the following tabs for "At Last" in C maj. I've not tried it fully, but it's a place to start! I'll paste the tabs here:
A request by Ray B in the key of 'C'.
'C'
At .. last ..... my love ..... has come a---long. ....
3 5, -5 -5*, -5 5 5 -3 3.
My lone---ly days ... are o----ver,....
-3 -3* -3 3, -2 2 2,
and life is like ... a song. ....
2 3 -2 2, -1 1.
At last ... the skies ... a---bove .. are blue. ...
3 5, -5 -5*, -5 5, -3 3.
My heart .... was wrapped ... in clo---ver,...
-3 -3*, -3 3, -2 2 2,
the night ... I looked .. at you. ....
2 3, -2 2, -1 1.
I found a dream ... that I .. can speak to. ....
1 -1 2 3, -2 2, -1 2 2.
A dream that I ... can call my own. ....
2 -2* 3 -4, -3 3 -2* 3.
I .. found a thrill .... to press my .. cheek to. ....
3, -3 -4 -5, 5 -4 -3, -4 -4.
A thrill I've ... nev---er .. known. .....
5 -3 -3, -3 -4, 3.
You smiled ..... and then ... the spell was cast. ....
3 5, -5 -5*, -5 5 -3 3.
And here we are ... in Hea---ven. .....
-3 -3* -3 3, -2 2 5.
For you are mine ..... at last. ...........
5 6 5 6, 3 5.