OK, my answer is no. Playing with both rods, I found the original is too big to go through the hole in the spring housing. The new version, while not a FLGR, does fit through the hole in the spring housing. With the slide locked back the short rods nose is just inside the rear part of the hole. The new rod goes though. The short rod will enter completely into the spring housing.
On another note, the original recoil spring is significantly shorter than any replacement spring. I have new, in the package, 13# & 16# recoil springs that are exactly the same length. The 14# & 15# springs are different lengths from the rest of them.
I have an email to Wolff asking about this.