There are a few things to comment on here...
The "scratchiness" is something that many people address by very gently working with the nib on any of several materials/surfaces to smooth the nib. Some folks prefer to have another person address these problems for them. I've smoothed a fair number of nibs, including one on a pen sent as a gift to a very good friend, and it's not onerous, perhaps tedious due to the slow nature of this for the amateur who doesn't want to destroy a nib. There are a variety of topics scattered around FPN that address the various approaches with the pros and cons (opinions) of each of the approaches.
"Modern" Pelikans don't come with flex and stub nibs. There are Pelikan italic nibs on some new pens, with various opinions on how "stubbish" or "crisp" these are, but most of the newer italic nibs tend to be a bit broad in flat strokes. I personally found the M205 italic to be excessively wide for my use, but, once again, opinions differ.
Bo Bo has commented on vintage nibs, but these are not as easy to obtain as in years past. I have vintage 400/400NN nibs with a great deal of springiness to them, but I'd personally consider these "semi-flex" in nature, not full flex. I'm pretty much in accord with Bo Bo's comments that there are some very definite limits on the vintage nibs' flex nature. Having said that, I know that what many people consider "flex" is not "full flex" or "maximum flex", so it's entirely possible that the vintage nibs would suit your needs. I'd recommend trying to attend a pen show or a Pen Posse meeting locally to see if the vintage nibs are a viable option for you. If there isn't a pen group meeting in Indianapolis, perhaps you could start one.
If none of that suffices, you're on your way to seeing a "nibmeister" to make over a nib to your needs. I've been extremely pleased with the work of John Mottishaw, Deb Kinney, and Pendleton Brown for various work performed on nib adaptations, but these have been modifications to become a moderate cursive italic nib, more crisp than a stub, but not "razor sharp" crisp. Each of the nibs by each nibmeister has had slightly different, but entirely enjoyable characteristics. I know that various nibmeisters have specific turnaround times, with some getting rather lengthy now. Pendleton shows up at many pen shows ready to grind right "on-the-spot" - he took care of several nibs, Pelikan and Sheaffer, for me at the 2013 LAPS, and they have been delightful to write with since the show. He's also a thoroughly great guy to meet in person, even if you don't end up having him grind a nib, so there's no downside at all on looking him up at a show. You can find several other pen builder/repair/nibmeisters here on FPN, but I can't comment on them from personal experience.
Edited by PJohnP, 24 May 2014 - 18:30.