It looks like it came off a Sporty...Maybe a "Custom". Any 2000-07 Sportsters will work. After that they went to 25mm bearings, although you can make those work with a little finagling.

 

I seem to remember the factory "2003 Anniversary" 883 sportster had a front spoke and rear solid cast aluminum rim, maybe getting one of these 2003 rims would also be a solution to what your trying to accomplish??

here is a random shot of a 2003 i found on google.

 

Awesome advice in here, guys! Thank you, everybody!

 

I bought my uncle's 2006 custom a couple years ago and it has the solid back wheel. He bought it new and I was under the impression he ordered it with the solid wheel. He wanted it to look like a Fatboy.

 

Pre Mid-glide "Customs" (Most if not all) came with a solid rear (well, some had small slots) and laced spoke front. That 2003 pictured above is a "Custom"

 

good info in here guys... been planning on swapping my rear to a solid. found someone selling a sportster one on LETGO app for $60 with tire. glad you guys started this

 

Found these:

http://delaware.craigslist.org/mpo/5685271193.html