Sadly there isn't anything that can be upgraded on the DDR end unless Big Al's decided to buy one of those awful US X2 cabs which I don't think they would do OR import a Japanese red, black or white cab. Which I also don't think they would do.
R1 and Dave N Busters are due for DDR 2014 White cabs on eamuse (all in english) in the late spring or early summer but we have no idea which locations will receive cabs. I doubt Big Al's would buy anything not in English so an import cab is out nor would they consider paying the fee for eamuse since it's only being used for 1 game. I am however surprised that Big Al's hasn't considered Pump Prime yet but I can see how that not being online as well would be pretty lame. Hopefully Kyle Ward can finish up this new 9 panel dance game he is working on and get an arcade into Big Al's in the coming year.