ron4735
, welcome to the post Ruger brother. The PC9 is a very soft shooter, it does not have much recoil, therefore eliminating a cushioned recoil pad. It is about the same as shooting your 5.56 or 223 rifle. The 30-30 has much more recoil and it is considered a soft recoil.
I shoot 30-06 when hunting, but to go out and re-sight my scope I use a face towel folded up into a small 4x4 square and place it on my shoulder just under my shirt.
After ten or more repeated shots the shoulder tends to get a bit sore.
You should be okay without a recoil pad. If you need one for personal reasons there are after market recoil pads that slip on and off. They don't look nice on any weapon, NOT AT ALL.
The PC9 is a fine short carbine rifle with minimal recoil for close quarter and in home defense as well as for 50 yards or more. Some guys are actually taking the PC9 out for dear hunting.
as for the extended butt pad, there is only so far you can extend the rifle from your cheek when shooting iron sites. If you mounted a scope, pretty much the same applies. It is a short rifle.
If it is a must have, go with Pachmyr. I'm not sure if hogue has one but they are a good brand worth checking.