They go on sale fairly frequently.

http://www.use-enco.com/CGI/INSRIT?PMAKA=BR505-
2253&PMPANO=0245627&PMKANO=16&PMKBNO=322&PMPAGE=28 &PARTPG=INLMPI

or

http://tinyurl.com/22qfv

if you prefer. I think that beats even HF for price.

http://www.use-enco.com/CGI/INLMPI?P...=322&PMPAGE=28

lists all the sizes, and I note that their wedge-type is
also on sale.

I haven't done much with mine yet (I got the 200 series)
but I'm tickled to death that I don't have to use the
lantern post I have for my lathe...

--Glenn Lyford