Need data for galactic rotation curves

[Buckethead]

I'm looking for sources of data for galactic rotation curves but need not only the observed rotation curves but also the expected (Keplerian) curve data to load into a spreadsheet to experiment with. After extensive searching I found a few pockets of data for observed velocities but not for expected velocities. I tried going through the NED website but the format is over my head. (I'm just a hobbyist not a researcher). So if anyone can point me to a site that shows raw data for 1) radius, 2) observed velocity, 3) expected velocity for some popular local spiral galaxies it would be very much appreciated.

 

[Buckethead]

Can anyone help with this or guide me toward finding someone that can help with this? Thanks!