I agree, the Winegard "crank-up" is not Direct HDTV capable.
So, the OP wants to get a "portable" antenna for Direct HDTV account(?)
The portable antenna offerings cause a big split between Dish and Direct....From what I know, only Direct SDTV can be received by any of the current manufactured "dome" antenna (portable or fixed).
So, what to do? The typical answer is to acquire a tripod mounted SWM dish.
Like:
Directv HD Satellite Dish RV Tripod Kit w Directv SWM 5 Lnb Dish (TKT-5SB) [TKT-5SB] - $149.99 : The Satellite Shop, Satellite Dish Equipment - TV Programming
These are not auto-aim, but will give you the signals you want.
I have not heard of any new domes coming for Direct HDTV...but that could change.
Best luck