That looks like that Ebay chassis from the guy in Ontario.... that's some quality piece he sells, eh?
The chassis is from Triode Electronics, nicely chrome plated and silkscreened. They also have a "Tweed" speaker cab, but it is larger than the original, and is (curently) apparently not available. Note that the volume and tone controls go all the way to "12", so
Spinal Tap and
Marshall both now have something for which to aspire
Tube Depot had the correctly sized cab, and it was immediately available, and since they are only one state away, delivery is fast!
TD does have a complete kit, but they use a circuit board rather than the turret board, (which isn't really a problem) and the cheaper Jensen "MOD" speakers, which I am sure, sound good, but they are not "original".
I wouldn't even consider attempting to DIY one of these Tolex-covered cabs. mysellf, it would probably end up looking like a badly corrupted, and slimed,

version of Homer Simpson's spice rack
I haven't played in years, mostly 'cuz I didn't have a decent sounding amp (I did have a SS Peavy 50 watter which barely survived a house fire), which a friend gave me, but its sound really s*cked (probably from the efects of the fire), so I just let everything go over the intervening years... . Couple years ago, sold the Fender Jazzmaster, and the Gibson LP, (and got some really good $$$$ for them) but kept the "beater" Gibson SG, as it has a great sound and a
really nice action.
/ed B