Unless you have a raw photo for the old picture and you can take a new picture with the same camera in the same lighting, then it doesn’t really help to have a CCPP. If the other photographer did a calibration of that lighting with a CCPP and can supply you the camera profile for it, and you can also determine the WB settings of that older photo by looking inside it with a text editor to see if the CRS XML tags are there that record what steps occurred, then you might have a chance matching to your raw and applying the same profile and similar settings.
If you really only have the JPG and no other information from the other photographer, then matching JPG colors also isn’t easy and takes a lot of trial and error, no matter what software you use.
If you only have Lightroom but have two monitors then you could conceivably display the old JPG on the second monitor, and lock that image, then switch to your new photo and play with things until the color is similar.
With Photoshop you can actually measure the RGB numbers for the color(s) and maybe use PS tools to match things a little easier, but it’ll still be trial and error.
Thanks very much for the guidance. I guess I'll try to do a side-by-side on an extra-wide LG monitor that I have.