Dont know where you are located, but you may want to contact South Central Outboards, Beecher City, IL.
(618) 487-9499. Talk with Alex. She may not have a 2005 cowling, but one that will fit in white. Any Johnson cowling from 2001 to 2006 will fit. You may like other styles better anyway? Different decals for different years.
If you are in the Michigan area contact Pine Lake Parts, Plainwell, MI (855) 313-3280. Talk with Shelly or Pat. I know they have white cowling that will fit because they got them from me!
Both of these people are AOMCI members that deal in salvage parts. The reason I mention it helps if you are close to one of them is shipping on a cowling is costly. They get damaged easily also.
Dan in TN