It could be that...
Kahr was afraid of "Kahr guns with 13 pound triggers" becoming available out on the street to the shooting public and damaging their reputation.
My K9 had the original NYPD-type trigger in it, and I later modified it to the better/shorter stroke Elite trigger by changing out 3 parts.
Kahr was already very well aware of some shooters concerns about the dang "heavy NYPD triggers" on the original K9s, and that also caused many shooters I know to paint "all the Kahr guns" with that same brush... "Oh, that's a Kahr? Gee, I heard they all have heavy triggers..."
So it's very possible they looked at the small number of incremental NYPD gun sales (with 13 pound triggers) and compared that against all their other gun sales and decided "not to do it" (to protect the brand), but diplomatically said it "couldn't be done".
That's my view of this, and it's just a gut feeling from 3 decades of business experience with various companies (and their brand reputations).
Old No7
"Freedom and the Second Amendment... One cannot exist without the other." © 2000 DTH