I have been looking for this but ratworx has had them backorderded for some time.  Now I see they aren't even listed on the site.  Are they out of production?

They are out of production, your only chance at this point is to pick them up on the secondary market.  

I take it very few were actually produced by MSAR then?

i think it was less than 30 total guns. then when they didn't sell well at 1450 they were broken up and sold as "kits".
I have one and had to do much work on the rear of the bolt to get the firing pin to go deeper into the bolt. now it's 99% reliable, before it was 20% at best.
it is fun shooting cheap ammo though.
i bought a spare bolt but it doesn't have an extractor and can't get one so i'm a little worried about breaking it..

I think there wrer 30-35 each of 7.62x39, 5.45, and 6.8.  The 7.62x39 guns and the 6.8 guns sold pretty quickly, 5.45 guns didn't seel too well and about half were broken out as kits.

That being said, I just pikced up a 7.62cx39 "kit" from Dave, he had picked it up from a guy who converted the gun to 5.56 as the 7.62x39 guns need some special work done to get them to run (shorter recoil rods or springs, and Wolf is a little underpowered to lock the bolt back reliably)