Just got a Shetland 570 that has been on a trailer for the last 10 years and has a BMC 1500 Wortham Blake conversion mated to an Enfield Z drive. Engine is fitted with a cartridge type oil filter the bowl of which has been removed. I found the bowl but its very rusty and I dont think all the washers etc are there. Does anyone know where I can find replacement parts for these type of filters or where I can get a conversion for a spin on type filter, tried asap but they no longer stock them. Also the battery is missing, what amp battery should I get. The engine is very old and is fitted with a dynamo not an alternator, would this make any difference to the battery choice.