Jonsered 490 and 590, Poulan 325, and the Husky 55 P/C are interchangeable. The Poulan is pretty much unobtainium in the US. The Jreds and the OEM 55 closed port kits are rare. There Chinesium 55 kits that aren't true CP to the original design.
I have a 490 and a 590 OEM kit that aren't for...