I have a set that I made before AST offered them. They work fine but will look rougher. In fact I gave AST the design. I'll look this weekend to see if I can find them. I no longer use them because I bought some Horizon ST HeliBars. I believe the units you are referring to are one piece. These are 2 piece. 2" risers stacked with 1.2" pull back and another 1" up. Your welcome to them, both the straight risers as well as the homemade pullbacks but you might have to obtain your own bolts. Fugly so if you would rather not you will not hurt my feelings. The good news is that the price is right. $0
Some old pics: