Definitely fits the "cool" bill, just not the bill-fold... A friend of mine used to build and repair tube amps as a side business {he did a great job on my wurlitzer 1080's amplifier} and he has built some pretty cool amps for people, he did one that looked like an old tractor hood for a customer, he also takes old cable boxes {you remember the really old texas instruments cable boxes from the 80's} and turns them into tube amps, nothing super powerful, I think they end up around 20w x2 and he makes the front number display display a volume number, they are pretty cool, he sells them for $1500 each!!! He built a pair of amps for a friend of ours, 450watts each!!! They are pretty simple built on stainless steal slabs that are 1/2" thick and raw cut around the edges {torch cut}...
Anyway, pretty cool stuff..