I don't have a backup of my stock ROM as far as I know.
I really wanted something close to stock, so I think I ended up settling on [Rom]TN_Elousions3.2_OTA_5.07.651.6_Deoxed_Stock_Theme. zip which is a moderate mod of the last stock ROM.
I ended up going through the S-OFF process as well to make sure that I had the latest radios and such.
It's functional, but between the Sense changes and the fact that it's Gingerbread-based means that there are some things about the UI that just aren't as nice as Evervolv. The upshot is that the battery consumption is lower and the hardware features work or work better (4G, FFC, camcorder, FM radio, etc.).
I'm tempted to try one of the last official Cyanogen ROMs just to see if I like the UI better than Sense, but I'll probably just stick it out until I get a new phone.