Your best bet for something simple and basic is the Kartboy short shifter.
Personally I'm running the 05 LGT KB shifter with the front shifter bushings, since the rears don't quite fit properly on the 06-08 Foresters.
You should be able to buy the shifter and bushings in combination from Tom himself... www.kartboy.com but it isn't an adjustable unit like you seem to be looking for.
There is at least one adjustable shifter on the market that I'm aware of. COBB made one that should fit the Forester, and it was a double adjustable unit. There may be some cheaper "knock-off" versions out there now as COBB have discontinued them.
Kartboy and most other aftermarket short shifters are "direct link" without rubber damping material in the shaft like stock. The (more expensive) Subaru short shifter still has rubber damping. I'm not sure what the difference in throws is between the two.
I have a very light 46g shift knob with Kartboy Forester shifter and hard front bushings and noise and vibration is more noticeable than stock. I did have to use a large fender washer in addition to the subaru one to take up extra space with the Kartboy front bushings (got it from Lowe's I think it was 5/16 ID and about 2 or 2 1/2 OD, came close to matching the KB bushings). The kartboy rear bushing just did not fit well on my 2004 either and it pushes up on the boot and mechanism, which I did not like the looks of, so I took it off and am happy with the stock rear bushing. The front bushing definitely makes the shifts "crisper". With the Kartboy Forester shifter the height drops about 2" with stock bushing, which I like even with the extended height armrest. The other KB shifter that will work is even shorter (don't remember if originally for Impreza, Legacy etc.).
If you drop it more than an inch or so you will likely want to get a shorter interior shift boot also. I plan on getting one from redline, which others here have had good luck with. I always thought the stock boots looked really cheap anyways since they had no leather-look pattern embossed.