Yes they are out there, but wow at the price.
In the late 1980s to the end of their run, they were affordable & slow sellers for retailers. The switch to dbl stack pistols sank the 52. But because we all want what we can't have, shooters began to admire the quality & accuracy of the gun. Much like the H&K P7 series, prices climbed steadily, IMO. And here we are today.
I own a 52-2, no box, bare gun. I once was blessed to have a one-on-one discussion on the qualities of the 52 with the esteemed Roy Jinks. He too admitted it might be his fav Smith. To this day I still treasure him taking the time to allow me to pick his brain. He is such a class act.
At a gun show about 30 years ago there was the Mag Guy. He had an impressive array of mag offerings, some of which were probably ok to buy & use.
I had the 52 only a week or three by then. So, being a smart aleck, I asked him for a 52 mag. I had two, but want three for almost any semi I own. Anyway, he looked up in thought, paused for about 15-20 seconds & bent into a 3-4 foot tall box. Rooting his arm around, he dug & he dug & dug. Then he pulled his arm up & laughed while handing me an in-the-wrap OEM Smith mag. Heck, I HAD to buy it after he went through all that.
The mag is still in wrap, I still have the 52 & plenty of ammo. I like to think of it as my "gentlemen's gun".
