welder/welding machine question

ok/ Ive done some checking, found out by one of the links here that you guys pointed me to, that the retrofit kit Im gonna need is207642. I see 3 of them from different sellers all around $130 ish. Dont look like that much worth of parts pictured haha The spool gun they show at the link I followed above for this machine is $1500 ish. No way. won't use enough to justify that. Thats also more than I paid for this welder brand new, all those years ago. Big difference between that one and the one I have, is 20 ft vs 10 ft cable. Other than (maybe) US made vs Chinesium (which I hate) but for 1/10 of the price I can deal with the shorter cord.....(remember I got this one 1/2 off) other than that I have no idea what might be difefrent between them. but the price difference is too huge for the limited amount I expect to use this attachment. If I find myself using it more than I anticipate maybe then Ill seek out the more expensive one.
They do show an equivalent spool gun branded Miller instead of Hobart "spoolmate 100"... this is "spoolrunner 100" branded Hobart Im bettin its exactly the same. (hoping)
My sons mother in law works for Bernard Welding, in the office. Shes helped out my son before with welder stuff for his work. . Bernard is also an ITW (Illinois tool works) company just like both Miller and Hobart. Bernard makes stingers and consumables for various welders.... that might be a good lead.