Battery

Well bought my 284 Jinma in 2003 had a backhoe and front end loader for the price of 9995.00 Anyway after 15 reliable years my battery finally bit the dust. Not complaining 15 years is not bad I think.  Anyway it is a AMARON Battery.  I looked in all the Jinma tractor stores no one sells batteries.. So I am reaching out anyone have a replacement battery that they want to recommend??? Thanks The size is around 12 length x 6 3/4 width  x 8 high a rough estimate as I have not yet pulled it out yet… Oh yea I belive it lasted so long because I would sit idle for hours in digging up trees in Florida and I mean hundreds of trees! Any way I am in Illinois now big difference in soil!