Kevin ,
There is one company that I have used for many years . They only recondition Brake Booster/Servos
Hydroboost
45 Mc Swains Rd
Echuca Vic
03 5480 0886
Contact Terry Morgan
hydroboost@bigpond.com
www.hydroboost.com.au
They provide a good service and are reasonably priced.
The best way to remove brake fluid is to rinse with plenty of water , then maybe wash with soapy water .
The important thing will all cars using conventional brake fluid that are not regularly used ,is to bleed the whole system with new fluid each few years .
Geoff