1963-D Roosevelt Dimes

I have close to a full roll (49) of BU 1963-D dimes that I wouldn't mind trading one for one for other BU (or even down to AU) Roosevelt dimes. Common dates obviously. I'd like to do this for fun, to help me and others complete their Roosevelt sets. The following dates I will trade 2 for 1 (less common dates):

47D, 47S, 48, 48D, 48S, 50, 50D, 51, 51D, 52, 52D

4 for 1 (semi keys):

49, 49D, 51S, 52S

and 7 for 1 (keys):

49S, 50S

All other dates are 1 for 1.

Maybe you've got extra rolls sitting around, maybe you need a 63D for your set. Help me complete a full set of BU Roosevelts!