Mitsubishi starter for 1998 Volvo Cummins M11?

Currently I have the original Delco starter ( 42MT if I remember correctly).

I'm trying to replace with new Mitsubishi but the dealer said they can't cross reference with Mitsubishi since the truck is too old .

Any ideas what Mitsubishi starter I can use on my 1998 Volvo Cummins M11?

Thanks.