I bought the pegs on ebay:
http://www.ebay.com/itm/281930547617?_trksid=p2057872.m2749.l2649&var=580902511306&ssPageName=STRK%3AMEBIDX%3AITThey're inexpensive Chinese pegs, but I was experimenting with fitment since I can't find measurements for foot peg brackets anywhere. I've ridden on them a bit, and can't get the rear brake and shifter as low as I want them for these pegs, so I'm going to have to fabricate up some custom stuff. Compared to the stock foot pegs, they are beefier where it counts. They also fold up pretty dang well, and take about a minute to change the position. It looks like the 50mm versions can be used at 50, 40, and 10mm lengths with 20 positions of adjustment around the bracket.
Edit: After checking the ebay listing, we have a decent selection of foot pegs from other bikes to pick from it looks like, even a lot of Ninja models which have huge aftermarkets.
I feel much more comfortable on my Connie with these pegs. I'm a little over 6', and the stock brackets made me feel like I had to bend forward a bit. It's easier to stand on the bike, and with my size 13 1/2 boats (boots) I set the bars back 15 degrees with the 50mm drop, and I can shift with my toes now instead of the middle of my foot.
Installing them is pretty easy, the stock springs need minor modification. The hook on the spring is facing the wrong way and is a little too wide to fit inside the beefier structure of the peg adapter, so take some pliers and twist the hook the other way around and squish it until it fits, or snip it if you're lazy like me (I bent one, and snipped the other just to compare).
The important thing these pegs proved, is that 98-08 Zephyr adjustable pegs will fit our bikes. I don't know about stock Zephyr pegs, but my goal has always been to take this bike and make it easy to find parts and cheap to repair. I like my new $25 super adjustable pegs.