So, I bought some new nozzles from AutohausAZ for my 1.5. They're 1.6 nozzles, but what the hey, they still work.
However, I'm a bit leery of putting them in. The tube they each come in rather prominently says "Made in India," along with the Bosch logo, information, and what I'm assuming is a Bosch part number: 0 434 250 063-3B3.
Right below that is: DN 0 SD 193.
I opened one tube, the DN number, Bosch logo, "INDIA," and the number 690 over "902" inside an oval are all on the injector itself.
Good nozzles, or did I get screwed with some knockoffs? I'm reassured by the presence of part numbers on the injector itself, but I've seen enough Chinese and Indian precision components to be more than a little wary of them...