Went to the isuzu dealer today and found the 5123190033 sleeve to be correct but the 1096253200 seal is just the standard 100mm item(same one as in my rebuild kit).We couldn't find a seal on his computer or in his books to suit the 105mm sleeve.What he did come up with is 8970728231,which is a seal and sleeve pre fitted together which can't be separated.It measures up good so will see how it goes,just need to make up an installing tool.