Hey, Smallpatch. It shouldn't really matter who the supplier is. Spring steel is spring steel. I use 1095 myself. But after your quenching, you should polish the spring. Once you get it nice and shiny, you want to very slowly heat it up. 600 degrees Fahrenheit is around where you want it for tempering, and if you can hold it there for a bit, it is better. But with thin, small springs, this is very hard to do. The lead treatment is best, assuming you have pure lead that is truly liquid at a little over 600. Submersing it in that liquid for about 60 seconds would probably do the job.
However, if you can't do that, you will need to look for color change in the spring. At bright blue, you are almost there, at Grey Blue you are there, and after that you will start to see redness, and that is not what you want. I have actually tempered to the bright blue color, and never seen any consequence from not going further. Also, do not quench after you get to the desired temperature... Just let it cool naturally.
M. E. Pering