For example, in this one by Lifeline the compass is too big.
Sorry,I have to respectfully disagree with you there. The compass in the RSK is a compromise between size and quality. Many people, particularly those who are long sighted and need glasses may struggle with a button compass. The issue with the compass in this competing kit is not size but but one of poor quality.
Any one with the nous to invest in a decent survival kit should have the brains to purchase a small base-plate compass as well.
The Silva 7, Brunton, Suunto & Recta equivalents cost less than taking the Kid's to McDonalds. If fact for the cost of a week's worth of McD's you could outfit yourself properly.