I bought from mastrecastbullets.com (IL) this spring. Mike has responded to my e-mail in a day, and his quote matched prices listed on the web site. At that time bullets from the regular catalog were available in days - which I ordered and received. For bullets from a "limited production" catalog, per Mike words, you had to wait weeks.
Shoot an e-mail to the address at the web site, and check whether he is still answering.
XRF analysis on the bullets has shown that there is no tin in there. Only lead (94.6%) and antimony (5.4%). Bullets from other vendors, which I tested, had almost 2% of tin. This perfectly explains why his bullets are not expensive - tin is the most costly component in the alloy. Nevertheless, the bullets had perfect shape (low tin affects the shape first), BHN hardness that matched the declared one, surprisingly low variance in weight (standard deviation for the weight was .13 grains, while I have never seen anything below .25 grains before), and gave excellent accuracy.