Dipsticks are here. All are bare aluminum. Total cost is $40 (does not include shipping). Shipping is $6.50 via USPS.
These are compatibile with Subaru P/N 11140AA150 and 11140AA046. These cover a wide range of 2.0, 2.2, and 2.5 Turbo and NA models. To determine if your car uses either of these models, click the links, select "usage information" under the various models in the USA section and see if your car is listed.
http://opposedforces.com/parts/info/11140AA150/
http://opposedforces.com/parts/info/11140AA046/
(o-ring is included, but not shown in pictures)
Original interest list. Parts will be sold first come first serve.
Running list:
1. Wleehendrick (unanodized, black, or blue), 2.5L
2. Nimrod8560 (anodized), 2.5L
3. Nuul (unanodized), 2.5L
4. Teesutt (unanodized), 2.5L
5. Xusia (unanodized, blue), 2.0L
6: 07 Fireblade (black)
7: Metros (black, unanodized), 2.0L
8: Joseph (unanodized), 2.0L
9: nkw8181, (blue), 2.5L
10: 04 Subie STI (unanodized), 2.5L
11: KC0433, 2.5L
12: dpKilty, 2.5L
13: drdracing, 2.5L
I know of a single manufacturer offering a drop in solution for Subaru dipsticks. They go for $73 (anodized).