I agree, if you just want an LP grill instead of NG, then just convert that one to LP. It is just a matter of swapping manifolds. The cost would be under $50 rather than buying a new "Made in China" grill for $750 that probably won't outlast the one you have now.
EDIT: You will probably want the tank scale and mount as well if you convert it. But, still, you should be able to get it done for about $50.