Not sure if this is the right area, I hope so.

Looking for a story(s), listed on a site that is currently down... possibly permanently.

The story(s) is about a Hypnotherapist I think names Dr. langston, who hypnotises couples for his own personal gain, one of the couples he tuns the husband into a shemale and the wife into a maid, I think he does it to another couple as well.

Hope some one can help.

That sounds familiar (although I think I remember the character of Dr. Langdon). I read a lot of mc stories, though. You might try the Erotic Mind Control Story Archive (mcstories.com); I usually get to that story archive through ASSTR. Check out the Collections page at asstr.org.

Let me know if you want me to help you search, but I'm almost positive that Simon has it archived there.

Lori...

Had a look around... again
Nothing there, tried the general archive and "Dr. Langdon"

Checked out literotica.com? They have an MC section and a TG one.