Both me and my friends speed sensor crapped out on our SVTs also.
The part you are looking for is the VSS that plugs directly into the side of the tranny. All V6 manuals, SVT or non, use the same sensor. Unless it's a early 95 which has no VSS. But that's another story.
I ordered mine from fordpartsonline.com. Here is the link to all the sensors.
VSS Replacements Mine came to $37.64 + shipping.
I don't have any pics for installing it but the easiest way is reaching down from the top, just to the right of the engine, and towards the back. The car doesn't have to be on a lift or anything to do it.
If you look closely down there you can see the sensor and wires coming out of it on the tranny.
Now, mine was very easy to do because my wires got damaged so that's why it didn't work. Usually when a VSS goes out, it is because the original stupid cheap plastic design snapped off in the opening for the VSS.
The replacement is not the same sh*tty design. It's metal.
If part of the VSS broke off and doesn't come out when you remove it, then you have to find a way to get it out before installing the new one. Don't push it into the tranny, cause then you'll have some trouble.

Good luck.