I looked for those as well (to no avail). I also dig the looks of the Markbass 632 cab, but couldn't find those either (new or used). But, a friend suggested to me Schroeder cabs a few years ago and I've been hooked ever since. I have a 4x12 cab and two of their 1212BMF (seen on my avatar pic). They have a more clean/sterile sound to them. But, that is what I like as I let FX or my amp color it to my tastes.
"Seeing the world in the blink of an eye"
Manning my 2 Fenders: A Hot Rod Red Jag Deluxe & White/Maple Standard Jazz. Carvin BX1500 thru two Schroeder 1212BMF cabs.