Fire and Steel light bar question

[thenemos]

I think I just figured out what model it is made for. Although not specified for my 1999 J1, it looks like it might fit.
Kawasaki Cruiser, Touring and Accessories 2002
Tubular Light Bars - Nomad™
Fits: •Vulcan® 1500 Nomad™ (1999-2001)
•Vulcan® 1500 Nomad™ Fi (2000-2002)
K32001-004C
Source: http://www.powersportsnetwork.com/enthusiasts/catalog_item_detail.asp?catalog=622&levelcode=4073&product=39074&cattype=&ProductCategoryCode=

[thenemos]

I know the light bar in the pamphlet on vulcandrifterriders website is the K32001-005A.  I just bought a K32001-004.  Can anyone tell me what model Vulcan the 004 light bar was made for, and what the differences are between the 004 and 005a (other than the number)?