There are many out there but I've found Maibach tractor in creston Ohio to be the best source for new seals\parts, they specialze in Oliver tractors. The lift arm seals you should be able to get at your local seal or bearing shop. The seal for your hydralic filter housing comes with the new filter or at least Agco provides one with their filter. The breather elments to my knowledge are no longer available. I would have your raditor recored unless you can find a used one but I would check with Kent or on Ebay.. I haven't found any sources for super 55 raditors but many for 550 which there are differences, plan on 300-400 bucks for recoring. Back in the day they ran 10W 30 engine oil ffor the hydralics but that no longer applies, you should me running hydro fluid for sure. From my understanding the biggest differnce is hydro fluid has a antifoaming agent in it and that importnat in hydralics. You can buy new grills from Korves Oliver, they have a website. Their another good soucre for parts.