I haven't met or heard about anyone making phosphorous meth in over 15 years in the US. I think most small batch cooks switched to the lithium "shake and bake" method many years ago.
Most major American cities these days are far more likely to have cheap and readily accessible cartel meth synthesized from p2p, though. It's better shit than most cooks can make and less stepped on too.
I haven't seen anything like homemade in nearly twenty years. I haven't kept up contacts nor used meth all that frequently in that time frame though.
Two years ago I could get the cartel shit in almost whole gram shards for $10/g and with prices like that even "shake and bake" doesn't make sense financially or for the time involved. I think not very much meth is produced domestically at all anymore which was not the case when I started many many years ago. Back then I paid 20x more per gram too though and it was infinitely harder to source. Now if I really want to do some meth I just have to visit a nearby street corner or the park where it, fentadope, crack, and spice are readily available.