Euro 30 are 3.5 HTHS and the Euro 40s are not much higher for the major brands.I can only find it in 0w30 on FCP Euro's site.
BTW, the 10w60 used to pop on sale on a well-known site. Nothing currently, but it pops back from time to time. Would have gotten some if I had any use for 10w60. But that's beyond the point. I don't feel comfortable with w30 for some reason. I'm probably wrong.