Hi Tomah
I don't take a statin but do take co-q10. I have found that it does help me with my energy levels. It could be a placebo effect but I have not stopped it to find out. From what I have read, there are no known side effects. I take 150 mg a day in a gelcap form (oil based) which is supposed to be more absorbable.
When I asked my cardiologist about taking it, he told me that if you are not taking a statin drug, there is no need for it but if it makes you feel better, go for it. When I asked him if he takes it, he said yes he does,

but I did not ask him if he is on statins. He does advise his patients on statins to supplement with co-q10 since there are some studies that found that statins deplete the co-q10 in the body which is needed by every cell in the body (especially in the heart) to produce energy. That depletion could explain the muscle pains and aches that some people on statins experience.
It seems that most of the real life experiences with the benefits of co-q10(other than heart failure cases) are anecdotal and that the supplementation helps some people but not others, so your husband could try it and see how he feels with it. It is like taking a multi-vitamin every day, there is no real proof that it gives you anything that you don't get from a good healthy diet but it does give you that peace of mind that goes with any insurance policy.
From reading about the benefits of co-q10, I did not come across a claim that it helps PAC's/PVC's.