Copy a custom work item type form and move it to another project

Hi,

I am in the process of migrating two projects (project A and B) into one separate project (project C).

Project A and B have a custom work item type BUG CUSTOM. 

Project C uses the standard Bug work item type. 

Due to the setup above, I cannot migrate BUG CUSTOM from project A and B to Bug in project C without losing data.

Is there an easy way to move my custom work item type template BUG CUSTOM from Project A and B to project C, so I can safely transfer all of the BUG CUSTOM data?

Thanks in advance,

Al