you dont have to run 110.  A lot of ppl run 100LL and are fine - it's usually only a couple of $ higher than premium.  I used to run 104 in my 500 and it ran really good.  Sunoco started shipping the 104 with ethanol and the gas station i bought it from quit carrying it. 

Just dont try to run higher than 110.  You'll likely not have the compression required.  It will just burn too cool.