I don't recall Husqvarna ever offering a 22" bar, do you mean a 20" or 24" bar?
In my .325 pitch saws 50cc or so and under like my 543XP, the 353, 550XP and the Wife's 445, those all use K095 mount bars, that are available in 13, 16, 18, and 20", there may be a 24" .325/.050 available, but I wouldn't use one of those on my.325 pitch saws
My 460 Rancher is an odd duck, using a K095 small mount in a 3/8" pitch, which I know has a K095 3/8" .050 24" bar available, but that is the longest factory K095 bar that I am aware of. Yeah I can use the 24" 3/8 chain on my other 3/8" pitch saws, but I mistakenly assumed that the 460 Rancher was a D009 Large husky mount, I wouldn't have bought it if I properly researched it and realized that it was an odd duck 3/8 K095
My 266XP, 562XP, 372XP and 372XPW are all D009 3/8 .050 with 24 and 28" bars
My "Team .404", 390XP, 395XP(X2) and 3120XP are all D009 .404/.063 with bars in 36"(x2), 44", 60" and 72", those bars are Husqvarna Branded, built by GB in Australia. The 50" would have been a great fit for my 48" Granberg ( Not to be confused with GB, Different Companies) Alaskan mill, it would have come really close to allowing the full capacity of the 48" mill, the 44" falls way short, but so far has always been adequate for my needs. The 60" would allow me to use the full capacity of the 48" mill, but is surprising how much heavier, especially in nose heavy balance it is compared to the 44".
I also have handle and rail sets to rebuild either the 36" or 48" Granberg mills into 60" or 72" mills, but so far, I haven't needed that much capacity yet
When I realized that the 50" Husky bar by GB, would be a worthwhile addition, it had become NOLA. I can, or at least could the last time I checked, order a GB branded bar, out of Australia, but the price hasn't been cost effective, for the amount that I would need it, so I still have that "Hole" in my collection
It is possible, that there is an aftermarket 22" bar available, but I am not aware of any, and that wouldn't be a common off the shelf chain length, that you would likely have to have a shop custom spin chains for, or possibly order online
I don't know the Stihl line that well, but I have read of some Stihl guys with what would be an oddball size for me, 25" bars, so anything is possible, but I'm not aware of any Factory Husky 22" bars
Doug