I just had a look at Hi Flite's website. If you have an older bike (77 or newer) of any make, this looks like the place to get seat covers and foam. You can get stuff that looks like OEM, or have covers made in any color you want with all kinds of fun designs silk screened on at no extra charge. I'm getting a soft seat foam and custom star pattern seat cover made for one of my old Kawasaki's, but they make stuff for your older Husky's too. The way to order stuff is to call them up.
Just a note on HiFlite seat foam. They custom make the densities of the foam, but don't have anything set like the people over at Guts Racing do. If you want a soft seat from Guts, you get a soft seat. If you ask for a soft seat from Hiflite, it will be more like regular or hard density. One can only wonder what their standard and hard foam is like....an anvil???? And once you've ordered it, you are SOL if you don't like it. They won' take it back. They did offer to make a second seat foam based on a Guts foam if I send them my (TE) seat for dealer cost, but I'm stuck with the first one. They claim to make custom seat foam to order, but if it isn't right for you then it isn't actually custom, is it?
Finally, I had to talk to the plant manager about the seat foam I got. He told me that they don't make any foam any softer than the one that they sent me, so sending my TE seat in would have been a waste of time and shipping charges. Anyway, he resolved the issue. They will send me a return tag and then credit my account when they have the seat foam in their possession. From now on, they will be sending foam samples out to prospective customers so they can determine if the foam will suit their needs or not.