sorry, dumb post retracted....
Edited by vixr - 9/6/13 at 8:07pm
For anybody interested, the board measures exactly 3"x3". It looks better in person than in the pics, exuding a feel of quality. I'll probably make a plexiglass window in the top of my case, it looks that good. I ordered a 5"x4"x2" aluminum box from Mouser, but after measuring the board, I would have gone with the 4"x4"x2" box.
These and many different sizes of aluminum and steel boxes, in natural and black, are available from Mouser, they just take some searching (Mouser's selection is gigantic) Here's the page in their catalog with links to their respective pages. http://www.mouser.com/catalog/catalogusd/646/2119.pdf It's the same style of box that n_maher used, displayed in the second post of the original ss thread.
Any A50K stereo audio taper will do. If you're going to mount it directly to the board, you'll ideally want to order one with 15mm pin spacing. The pot listed in the BOM is from Mouser, and has 12mm pin spacing. I learned this after buying all of the parts and having the board arrive last (no complaints, it was actually quick for overseas). As far as I could tell, Mouser doesn't carry a 15mm pot of the right spec, but don't worry. The pins on the 12 mm pot will easily fit this board with a little bending with some needlenose pliers. The center pins are perfect, and the outside pins need to be bent only 1.5 mm outwards, I can confirm here that the pieces fit in this manner, with just enough length for proper soldering.
In case you don't like bending, or aren't ordering from Mouser, I pm'd Fred about this, and he said that he gets the 15mm pots from ebay.
Someone is about to be very happy...
ECC82 is the european version of the 12AU7 so no problems there
Other than the 12AU7 tube instead of 19J6, is this the basic BOM? http://www.diyforums.org/SSMH/bom/SSMH.htm
Watch out, don't make the same mistake that i did. R2/R8 is 390k for the 12au7 version.