Research the success rate of third party efforts over the last 100 years, Andy. It's not too hopefull.
The greatest concentration of true conservatives is already in the Republican Party, they are just NOT in the leadership above the precinct committee level. The Rinos on the upper level have all sorts of barriers in the Party machine to prevent this from happening. The only way to bring conservatism to the top in the party is to take it over at the precinct level where the work is done. The precinct committe that I'm a part of has become all conservative with the exception of one or two plants from above that everyone ignores.