tube output on a carver sd/a 360? any upgrade?

i have a carver sd/a 360 which i really like, i keep trying to put it against newer players but they dont hold up, i know the only better players are the carver tube players, but they are spendy and rare!!.. however, is there a way to add a tube output stage on a 360?, or what way could i sweeten up the sound? they have external tube outputs on ebay but they are all from china..any advice?

A Tube buffer would be the cheapest way to mimic the tube CD players, an external DAC would cost a little more but is an excellent option as well.

You could try a Jolida vacuum tube dac

Uh sweeten the sound, yeah, start rolling some tubes in that beast.