Profiles for commercial printers using RA4 or similar chemistry for silver halide prints are pretty much useless. There are those who may disagree, but believe me, I've worked in labs for over 20 years. Too many variables. Examples? Sure...
Most RA4 machines are calibrated upon start-up in the morning. In most labs, 2 tests are run:
A grayscale strip test determines the current coloration of the bulb in use, with digital machines this is usually for the 35mm scanner, so it doesn't effect prints from digital sources. This test utilizes the paper currently in the machine.
A grayscale patch test determines the actual colors being produced by the current chemistry on the paper batch in use. This test utilizes a control strip previously exposed by the paper manufacturer on the same paper batch. It does NOT test the actual paper currently in the machine.
So basically, the lab is testing the bulb age - and inputting a correction value for it - and the chemistry's current state of affairs with a like batch. The theory being that these tests, when performed properly, are so precise as to be sufficient to compensate for the other variables and still produce a correct and stable print. On a weekly basis, most labs run a color curve test, and monthly (at least), monitor calibration.
Here's the rub...
1) How old is the paper roll in use?
2) How long ago was it started?
3) How late in the day is it?
4) How expert is your lab tech at spotting minor fluctuations?
5) How incremental are the color and density adjustments on that specific printer?
6) How well is your monitor calibrated?
7) Are you bringing the lab a "hands-off" file, or do you want them to adjust as they see fit?
Printer profiles are great for inkjets, since oxidation and depletion of chemistry and ageing of paper dyes aren't an issue. But when you get a printer profile for a silver halide process, the profile is only truly accurate for that exact instant that the profile was created, with that exact chemical age and that exact paper batch. Change either, and the profile's no good!
The far better way is to simply find a good lab, take them what you think is a properly adjusted image and have them print it straight...no density or color correction. Then have them print a second one adjusted as they see fit. That variance, if any, will tell you where their equipment lies on average. Then make your images to be printed to match. It's a bit tedious, but it'll get you right in their ballpark, and as long as their morning tests come up good, you're in good shape.
And be sure to go to a somewhat busy lab. That way the rolls will be changed out pretty often, giving you better odds as to paper quality.
Hope this helps,