I will try to be constructive.
Assuming you have the hours required, the CPL course is 25 hours or so and then you could add a 'single' engine IR onto it, which I think is 50 hours but 35 in a sim, and you will have 10 hours from the CPL course.
I will admit I may be wrong , and of course a single engine IR has little use BUT this may let you keep the ATPL exam credits at a lesser perhaps more affordable cost.