The only natural consituency that conservatives have in this regard are churches (those that still preach The Way versus social gospels or a different Jesus). It's good to support those churches that run pre-K - 12, as well as Christian colleges/universities. Otherwise, most homeschooling networks are dominated by conservatives.
Those that are grounded solidly in the Gospel are most likely to have K-12 schools.
The others though?..Well?...I haven't much hope. Why?
Answer: There are too many government school employees( as well as those who directly and indirectly getting money from the schools) sitting in the pews. Few ministers will bite the hand that puts money in the collection plate.
In my county, the government school district is the **largest** single employer in the county. NO other business comes even close in number of employees or size of payroll. Even my dentist and his 5 employees are very dependent on the government school dental insurance that school employees bring into his office.
It is amazing how far, wide, and deeply, the government school cartel and price-fixed monopoly has distorted markets in our nation.