Try midwayuk they sell a tool which is used to remove stuck beretta choke tubes that looks very similar to the one in the picture.
http://www.midwayuk.com/apps/eproductpage....leItemID=814162
Liam
I would stay away from the cherokee 2.5 diesel as they are prone to head gasket failures and usaually require all 4 cylinder heads replacing. not a cheap job!
Ive got a al391 urika 1 in camo and found that you dont really notice it's plastic when you're using it. It's a good gun and i would recomment it.
Liam