i have sent MEGATRON to Beijing with SR-009 and SR-OMEGA for a big flagships party.
And the He1000 ,Abyss 1266 ,Jade(Winny will come) , SR-009 , SR-OMEGA has already for the PK.
My friend in Beijing has a BHSE,and he is waiting to do AB test between MEGATRON and BHSE.
Closest I can think is a version of what Colin was talking about You could use a NUC to run daphile and likely to store you content as well, then just basic wifi to get to the UI. I realize you said you didn't want any network connectivity. Still, I've been playing with daphile and it's pretty cool.
daphile
You can plug a 2TB HDD into a Rpi via USB, then connect the Rpi directly to the transporter/touch with a crossover cable. Run Squeezeserver (or whatever they call it these days) on the pi (and possibly a DHCP server to give the touch an IP) and you have exactly what you want with one small extra box. And it would be pretty easy to make a small box that would hold the pi + HDD to bring you back down to a Transporter with a box hanging off the back.