The fire bottle and actuating mechanism is not a lot (if any) differrent than systems used in industrial or restaurant systems etc.... so, yes, you can use any able fire extinguisher or system servicing company..... the difference, though, is that in racecars, you have lines and nozzles etc. that are NOT under the rule to have the bottles inspected.... DO YOUR REGULAR CHECKS on the rest of the system .... you NOT getting fried hide would be the reward