Yes, we have them in stock now - here's the link to the accelerator section:
http://amigakit.leamancomputing.com/catalog/index.php?cPath=43The 060 is a relatively cool chip for its speed so it can live in an A1200 desktop unlike its smaller brother - the 1240. You will need to install the 68060 libraries, but these are supplied on a floppy disk with it.