The Tube Research Labs website is here:http://www.tuberesearchlabs.com/index.htm
I believe they charge $550 plus shipping for their mod of most players. You supply the unit. They do a lot of Sony's. They will source the unit for the Sony 595 which they are doing a bunch of right now and they are buying 10-30 a week of those.
I know they also do mods on other units besides Sony units such as Esoteric, Marantz,Denon, and other already modded units that people are not happy with, etc.
Paul would have to quote you on specific units, but again I think most units are $550.
Yes, it is cheap. If that bothers you, then there are plenty of other options that will take more of your money-like 10 times that amount.
The sound? The best digital I have ever heard. Think of the best analog turntable setup you have heard and you get the idea. Many would agree and they are dumping their other modded units for the unassuming TRL Sony 595.
Since I have not heard as many units as some people, you may wish to look at this review from 6 Moons on the TRL mod of the Sony 775. http://www.6moons.com/audioreviews/stephstuffers/stuffers.html
The 595 mod is much better according to all who have heard both. The same reviewer is doing another review on the TRL 595 this month in 6 Moons. He apparently is quite impressed.
There is a thread below about the TRL which turned into a troll thread, but there is other info in it that may be of interest.
Good luck in your search.
Feel free to email me offline if you wish.