Hey Steve,
Thanks for the compliments.
There are two places you can get one.
First try
http://www.chriscoffee.com if he's got the model you need, that's probably the easiest route (and also the cheapest, I believe).
If Chris doesn't sell a bottomless to fit your machine, the other option is me.
I can modify a portafilter that you supply for $25 including shipping. I should also warn you that thru me is also the slower of the two options.
Contact me offline if you are interested in having me do one for you.
lino@vernadesign.com
ciao
lino