Here is a Tridonic/Atco ballast that will run your North American market 175w H39 mercury vapor lamp perfectly:
https://www.ebay.com.au/itm/264241467402Note that the “130v” on the listing does not represent the mains input voltage since this is a 220v-240v 50hz ballast, but the 130v refers to the lamp’s arc voltage drop. However, the ballast is priced at a little over $200 AUD.