As mentioned, Lipsey's is selling a 44 Spl Flat top. They will get 1000 of these pistols total. They received the first 250 this January. The delivery schedule is 250 per quarter.
After the quarter is up, if sales are high, maybe Ruger will make it a regular item.
I would not hold my breath about it ever being a regular stocked item.
I can recall when S&W brought out the M624's in 44 Spl. Nut cases, like myself, who had been waiting for decades, went out and bought one. The rest of the world sat back and asked "why should I buy a 44 Spl when a 44 Magnum will shoot both?".
Once the pent up demand was quickly satisfied, the rest of the M624's sat on the shelves. Might have been a total of 7500 made. Those that sat on the shelf were in time heavily discounted. S&W did not make 44 Spl N frames again until the Thunder Ranch specials, 20 years later. And that only at the urging of Clint. My local gunstore said it was the worst decision they ever made to stock up on those M624 44 Spl S&W's. You could buy one for $250.00 in 1986.
Now, 23 years later, those 44 Spls are extremely hard to find because production was for only one year.
I suspect the same will happen with these Ruger 44 Spls. There will be a one time offering, and that will be that.
Then if you want a Ruger in 44 Spl, you will have to supply Mr. Bowen with a 357 version and $800.00 for the conversion.