Source for BB Bearings

My bike uses the FSA Megatech Integrated BB, circa 2003. The design uses an OS BB shell with pressed-in bearings (no threaded adapters), carrying an ISIS spindle. The bearings are 27x43x8mm, (SS and 2-RS). The original bearings were marked "THI", which is the Taiwan company that makes and markets the FSA brand.

The design was promoted as an "open standard" for the industry to use. FSA had the drawings and tolerances on the web, and offered the cutting tools to finish and face the BB shell to exact dimensions. In addition to bigger bearings for the ISIS spindle, the OS shell allows more weld area for the frame tubes. The "open" design failed to catch with any major manufacturer then, but now it seems Trek and Cdale are now offering their own proprietary versions.

About 4 years ago, the LBS ordered replacements from FSA, but contact with their tech support recently only got me the "FSA no longer supports this product".

Have looked at online bearing houses with no luck so far; the size seems to be a weird one. Any help to point me to a source would be greatly appreciated.

Update: Well, FSA Tech Support came through for me big time. A couple of weeks ago, out of the blue, I got a followup email from FSA Tech Support, informing me that he had found a box of old "Megatech" spares in the warehouse which they would be happy to ship to me for $20+ S&H.

My package arrived a few days ago, with 13 bearings, lots of ISIS spindles as well as 3 threaded adapters to convert the 43mm BB to standard british threads.

I replaced the old bearings sunday evening and the bb is smooth and quiet again. Turns out the old drive-side bearing had ingested grit, making the spindle hard to turn once the crankarms were off. Hadn't done the replacement before myself, but a homemade bearing press made from 7/16 threaded rod and a couple of PVC pipe connectors did the job just fine.

In summary, thanks to the outstanding personal customer service of FSA, another Christmas was saved....and it's mine