I have a 1995 RHD Cherokee and I'm having trouble finding parts. I need a heater core. Any ideas where I can buy one. I'm in Michigan. Thanks.

 

Don't know of any state-side personally... since here they are generally used for postal duty and the like.
But you might try some overseas sellers on places like ebay in either the UK or where I used to live in Australia. XJ's are pretty popular down under. I would think you could find a seller willing to do international shipping fairly easily. When you have an RHD of any kind really in the US, you kinda have to be a bit resourceful in locating suppliers for replacement parts.
Hope that helps.

 

car-parts.com
Search until you find a rhd.