There is a number of companies in the US that pursued their own type certificate rather than paying the 200k to Brainerd to buy firehawk type certificates. It’s a paperwork exercise and inspection by the FAA. Timberline,Pjs, Avista, Billings, Coastal etc etc all have their own type certificate with names such as Timberhawk, Utilityhawk, Mountainhawk etc etc
I have worked with HP. Small company with one hawk and a uh1h+++.
There is a huge supply of parts with companies such as Brown Helicopters in Florida having purchased over a 100 blackhawks from gsa and selling them as parts. Many companies doing similar. As far as manuals and experience, it is a proven machine so no shortage of either. It has transitioned well into its new role in the utility world.
On international assignments, Billings sold one hawk to a SouthAfrican company. Also there is a Blackhawk currently working in New Zealand. Plenty hawks buzzing around Australia on fire season.