I don't think a 98 model will fit a 2011 model. They has some 99 models on eBay pretty cheap but it was not compatible with my model.
Could I be wrong guys?
This listing on Amazon says it fits 98-2012 customs:
I can take pictures and measurements after work tonight.
I just checked a few accessory shops and ebay listings and it looks like it will fit, but take a look at the measurements in the pictures and then measure your bike to see if it looks like it will line up.