If you are looking to do a build you should look at Fusion Firearms www.Fusionfirearms.com . They do a lot of guns in 10mm and their parts and service are top notch. I recently got one of their custom Officers in 45acp and it's the nicest I've seen. I'm not sure if your being in Australia is a problem or not. They have three 10mm listed on www.gunbroker.com at the moment if you want to see what they look like. I'm hoping to buy one soon.