i have no idea, i had a look at it before but i came to the conclusion i don't like mambo and there were other things i would prefer to make, however someone else might be willing to make it, i wonder if it would be worth asking in the mambo forums?
Yes, it would be worth it to even hire someone to work on the converters. Mambo is a very popular CMS, and I have even looked into it. While I decided to hire a friend of mine to work on my site, Mambo itself is very attractive when compared to other CMS' on the market out there today.