Dude, it was a joke... they're not made by Toyota and weren't stock:
http://cgi.ebay.com/ebaymotors/ws/eB...K%3AMEWNX%3AIT
I own some too.
EDIT: Manufacturer DEPO Auto Parts Ind. Co., Ltd. of Taiwan. What do yours say? Also, I don't believe real Japanese OEM signals would be marked as being DOT/SAE compliant. Do yours have the same info on them? Part numbers on my signals are: 01-312-1643R-C and 01-312-1643L-C, didn't see it on any of my side markers so I presume it may be on the back side and I don't fell like pulling them off to check.
EDIT2: They make OEM replacement units and they make "Tuning" lenses.
http://www.depo.com.tw/asp/pdf/P_TY_CELICA.pdf No idea why they're listed in the catalog for the '94-'97 Celica. See the bottom of the catalog page and you will see "All items shown in this catalogue are not original parts."
The stock units I have are labeled "Toyota" and "Japan".