awsmith,
I carry a 46.07 PW from my X20 Tours, and two Cleveland CG14 wedges: 50.08 and 56.14.
Last season, I carried the PW and three CG14 wedges: 50.08, 54.12 and 58.10 / but, the 54 was iffy on bunker shots, and the 58 had bad days on greenside lob shots. So, I dropped both for the 56: This cut down on mishits, and simplified my short game practice.
For your situation, check the yardage distance between your PW and 56*. Try to find a club that will split the difference.
Your AP1 PW is 45.06, with a 35.75" shaft. The AP1 W (gap wedge) is 50.07, with a 35.5" shaft. (5* difference in loft, but only 1/4" difference in shaft length. (Ideal yardstick between numbered irons is 4* loft, and 1/2" shaft length).
If you find pre-2010 CG14 wedges (gold gel insert), you'll have more variety of loft/bounce to choose from. If you get post-2010 versions with Tour Zip Grooves (black gel insert), you're looking mainly at these:
50.08 | 35.5" (if you can find one)
52.10 | 35.5"
56.14 | 35.25"
60.12 | 35.25"
You could go with either a CG14 GW or an AP1 W, whichever one feels best. You might have to bend 1* to get exact. And, pay attention to shaft lengths, this will influence distance by a couple of yards. Also, make sure grip thickness matches across the wedges.
Also, check Ralph Maltby's link on wedge fitting: http://www.ralphmaltby.com/17