Mr. Lucky is correct, in '07 the softails went to a bigger diameter front axle for better front end stability. If you switched the fork sliders, you'd have to change out the axle, spacers, wheel bearings, and front wheel to '06 or prior.
Thanks for the infor. I am getting a 09 night train and want to power coat the lower legs. Thought I would get a pair of used ones and have them power coated.
I got my powdercoated lowers off of Ebay. (Actually got the entire front end tins, but only wanted to use the lowers.) I paid a little over $100.00 for the whole set.
The seller was voodoo041672. You might contact him to see if he has what you need. I believe that he gets take off parts and powdercoats them himself.
i also got my lowers from the same ebay seller. just contact him and tell him if you want flat black or gloss and he will have em for you in about a week for 100 bucks. also you want sliders for a 07 and up, i was just in your boat.