Kris, both Met-Rx Protein Plus and Chemical Nutrition (Dorian Yates Approved) are casein based and readily available in Australia - around $70 for 900 gms. Personally, i’ve found that the Met-Rx is the best tasting protein powder i have ever tried (havent tried grow).However, i’ve had a problem getting the Met-Rx recently as i heard that the Australian distributor was having some financial problems. Hope this helps.