I was looking at them for my son, and decided to put my own setup together.
ATV Winch Line with eylet ends:
https://smile.amazon.com/gp/product/B07LD594M6/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
330 Pound Magnet:
https://smile.amazon.com/gp/product/B074BTSR1L/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Also, a add a link connector (the one that looks like a chain link with a barrel connector) from walmart for less than $5. I already had locktite.
For me, I'm using 100 feet of aged out synthetic winch line that I got from a guy who was replacing it on his Jeep. In either case, if I snag, I can hook up to my Jeep and not really worry about having the line break. Plus I have a winch and 100 feet of cable on my Jeep. I'm not losing a magnet.