The internet is has a wealth of information, but it can be hard to dig up. These are resources and reccomendations for pilots based on our personal experience:
Higher Ground Aviation LLC is a small flight school and is located at the Knox County Regional Airport (RKD) in Owls Head, Maine.
Seaplane Outfitters designs and manufactures intuitive solutions for seaplane operations including 1 way float check valves and a 2 in 1 seaplane paddle/pump combo.
TK1 Racing develops heavy duty suspension and gear for backcountry aircraft. Their durable designs are setting the bar for STOL in competition and harsh environments.