The majority of my lead is wheel weights. I have one tire shop that gives me their lead. One of the County shops will give me lead and the other is run by a jerk that won't. I think he is selling it on the side. I get pure lead roofing pipe jackets from a roofer buddy (trade him ammo for it). I have made some deals for Linotype in the past. I have used Rotometals for 50/50 bar solder, but yes it is expensive. Tin is very desirable, but not absolutely necessary for many applications. I use pure lead to "stretch" my other materials in lopw velocity applications (.38 and .44-40).
I use a Lyman lubrisizer with heater plate from MidwayUSA and hard lube. It may be a little slower than the Lee TL's, but much cleaner. I just don't like the TL molds. I do not like the designs, they are not "traditional looking". I blend my metals for the application from 20-1 Lead-Tin for muzzle loaders and shotgun slugs to 50/50 wheel weights/Lino for rifles and a few select handgun applications.
I load a lot and save my scrap brass in a bucket. When I have a 5 gallon bucket of brass, I take it to the scrap yard and "trade" it for lead. I take the dross and steel WW clips to the scrap yard and give it to them so it gets disposed of properly.
In life, strive to take the high road....It offers a better field of fire.
"Robo is right" Fuzzball