In addition MTI (
www.mtixtl.com) sells polished DyScO3, GdScO3, and TbScO3 (respectively, U.S.$ 129, 85, and 100).
I obtained some Sc metal turnings from PIDC, Lot A43932-ER. The certificate of analysis reported (in ppm): Al 304, Ni 94, Si 77, Fe 54, Cu 32, Th 12, Ti 10, along with a host of elements less than 5 ppm, yielding a Sc concentration of 99.94 wt%. I note that Ta was not analyzed.
I still have around 4 g of turnings, and a 2 g vacuum-melted lump.