You are right
@Wmmichael20. No mention of them on the Marlin site, but I did a search and found that they have been for sale on a few sites (although like many firearms, they are no where to be found at the moment - other than on gunbroker). Just added the UPC to my expanding watch list on gun dot deals dot com.
My heart was somewhat set on a non-black tactical version, and ideally in 444. But then I searched for ammo and found only one online seller. 45-70 is a bit more widely available, but at much more expensive pricing- $4.50-$6 per round!
Finally, I realized that in my delusions last night, I forgot that I would need to buy a larger suppressor for a 444, 45-70, 35 Remington, etc. Maybe the 30-30 is the way to go anyway....