Hey amglo don't give up to soon. See if you can try out a bike with a harder seat and back rest. The back rest will pivot your tail bone off the seat and a harder seat will prevent you from sinking in to the point where your tail bone is once again touching the seat. As suggested previously, you might also want to try running boards. This will allow you to move your feet back a little. Mid pegs may also help. There are a number of ways of attaching them, one of the simplest is to fashion a new rear peg holder to hold two sets of pegs (
here ).