I do not know if you are past this already or not. Last year I too had a tire destroy my fender and I bought 2 of the FS2245. I installed one and still have the other new in the box as a spare. I can measure, takes more pics etc if it helps you any. This link will take you to some pics
Mine is a 2004 T310SR, but it has the same original axle setup, and tire size as the 2005's 8,600# GVWR campers before the change to the gold fender in 2006. Sunline used the same fenders across all models in the same range of years when the GVWR of the camper would align. They are not really different on every model. All 2005 8,600# slide room campers would use the same fender. And I believe the 2004's are also the same, and on the 10,000# SR campers.
Mine was not a 100% exact fit, I would say a 95% fit and I tweaked the rest and it covered what it needed too and I was happy with it.
The way Icon makes their molds is, a customer sends them the leftovers of a broken one. They make a mold for it, sell them their fenders than offer those as replacements to others, like you and me. I do not think the originals from Sunline were even exact across a year or so run of them. The molding process of that ABS plastic is not that exact. And how Icon measures them is not in an exact manner. And the part is not easy to measure with the compound curves. While it did fit, I could not exactly get their measurements to align with how I measured their fender. They may have a tolerance a lot larger than we think.
Bottom line, I could make it work as a fender to cover what it needs to, in may case the FS2245 worked well on my 2004 SR camper.
Hope this helps
Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
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