Phil Peters at email@example.com make these levers and is also the Technical Advisor for the 1928-29 Durants. Last week Australia Post started accepting shipments from America so there should be no issue in mailing them to you, while postage will be high, I think it will be worth it because the levers are of excellent quality.
Where Are You From? Fremont, CA
Do You own a car built by Durant? 1931 Model 619 and 1929 model 60 Roadster