What year/make/model truck do you have, and what are you trying to do (or want to have done)?
I doubt you'll find anyone publicly advertising tuning anymore. Thank the EPA for that. Depending on what you need done, you may have to download the EFI tuning software, buy a V2/V3 and learn to do it yourself.
I mean you could copy some of the calibration with maybe some conversion tables etc but, regardless yes, thats not quite how it works and wouldnt be advisable. Sounds simple but...there are other things at play. Just as easy for a tuner to start from stock anyway since you need license the new truck anyway.