Moog strings - are they necessary, where to get them?

Just picked up an E1 on eBayband waiting for delivery.

I know it shipped with 11s; I don’t want to work that hard so I want to set it up with 9s.

So where can I get the Moog-specific strings nowadays?

And are they even really necessary? Anybody experience any real difference with Ernie Balls or D’Addarios?

I haven’t been able to find Moog strings for a while. I’ve been using either Ernie Ball Aluminum Bronze or D’Addario EXP Coated Bronze on my Moog guitar lately without a problem. I’d like to see the Moog strings make a comeback though.