To have all new stock tie rod parts, you need ES2234R (1), (1) ES2233L, and you will need to get a tie rod link from a junkyard. I don't know the part number for the adjustment sleeve, but between yours and the one from the junkyard, you probably won't really need to buy one, although they're probably only a few bucks.
If I were you, I would just order a tie rod from here
http://offroaddesign.com/catalog/HDsteeringlinkage.htm and tell them you want to use two of their tie rod ends with it. Otherwise, you can use ES2010L and ES2234R/ES2010R
OR you could just tell ORD to make your tie rod with RH thread on both sides and use ES2234R on both ends (this makes sourcing parts much easier/always locally in stock). Setting toe is negligibly more time consuming with this, but a lot of us do it. In the end, I think you're probably only going to be saving $30 or so by doing stock parts, and you obviously are able to damage the stock stuff.
I wouldn't even bother with a stabilizer, but if you're determined to use one, ORD sells a bracket for it right there on that same page I linked for you.
You can also make a tie rod really easily, but it sounds like you'd be happier with something that's ready to go already, and you won't save a huge amount of money since the DOM is usually around $10/foot.
There is no reason to replace the pitman arm, and I'm not sure you can even buy a replacement. The people that told you that are morons. To do a draglink on a stock steering system for these trucks, you will replace ES2026R and ES2027L, and the adjustment sleeve.
So to recap, if you were to overhaul the entire steering linkage, these are all the wear items/replaceable items for a stock 1/2-3/4 ton K series GM.
Tie rod:
ES2234R (passenger-side tie rod end)
ES2233L (drivers-side tie rod end, very long and has hole for stabilizer)
7/8"-18TPI adjustment sleeve
*actual link (about 50" long) is
not a normal replacement item*
Drag link:
ES2026R (drag link end)
ES2027L (drag link end)
7/8"-18TPI adjustment sleeve
*pitman arm and steering arm are
not normal replacement items*