Certainly, it's an old item and aftermarket versions are extremely cheap.
I had a fuel regulator fail in 2004, it was on my BNR32. Rare occurrence, most likely.
If you're doing the pump, why not do the regulator, unless you cannot afford it of course.
In my point of view it's a matter of convenience.
Also, please do not skew my words, I never said that replacing the regulator was required.