Life In 19x19

Have any of the users here ever had games commented on via .sgf/email by strong amateurs or (preferably) professionals?
I'm currently doing a lot to try improve my game- watching lectures at internetgoschool, doing the training system problems there daily, solving tsumego daily, playing a lot of games and reviewing as best I can myself.

However I feel I could gain a lot from getting a game reviewed every week or so by the same teacher.
I would consider getting private/group lessons but I haven't found anything suitable, due to either time constraints (I work shift work) or time-zone problems. That was a big part of the reason I signed up for internetgoschool- so I could have lessons of sorts and exercises to go along with it when it suited me.

I have heard that An Younngil offers lessons, however it's all anecdotal and I haven't found any information online. He would probably be quite suitable due to being in the same time zone.

Any suggestions or experiences are greatly welcomed.

Unless your or the teacher's daily schedule is very tight, time zone differences should not be a real problem, especially not for written commentaries.

Go Teaching Ladder might be what you are looking for. Give the whole world a chance to laugh at your mistakes, that should motivate just fine

If you want to receive reviews by the same teacher every time, there are a lot of possibilities as long as you are ready to pay.

On the top of my head:
http://breakfast.go4go.net/?Go_lessons (Alexandr Dinerstein)
http://www.nordicgoacademy.com/reviewing-services/ (Antti Tormanen, Juri Kuronen, Su Yang)
http://home.snafu.de/jasiek/teach.html (Robert Jasiek)

Many more that I can't remember at the moment.
Many strong players on KGS use their profile as advertisement for this kind of services. If you check the personal information of strong players regularly you will easily find this kind of services.

I dont think you really need to spend money on reviews till you reach dan level.
At SDK level you can get free reviews on kgs teaching ladder.

Thankyou to everyone for their responses. I guess ideally I would like to get reviews from the same person for a sense of consistency, and hoping that they will be able to pick up my mistakes over a series of games rather than just individual game's mistakes.
I'd also like them to be as strong as possible (so preferably pro), I think for fairly obvious reasons, and of course being a good teacher is vital.

I'm sure the go teaching ladder has some very good points, I've also had some very useful reviews here as well, and when I played as part of the ASR League.
I note that Alexandr Dinerchtein also offers correspondence teaching games, and so this could also be a useful learning tool as an alternative.

About ten years ago I bought reviews from Guo Juan.