You can get sound on the version with SenseUI. All you have to do is download and replace the zImage file. Download the 4/23 version of Android, install it, run it once if that is your preference (or not, it really doesn't matter) and then download the zImage and modules (bundled together) and replaced the existing ones in the andboot directory on your sdcard. All your settings will remain intact and you will get sound.

As for downloading SenseUI separately, I don't believe so. I'm using the 2.1 build with SenseUI built in (not sure of the date) with the replaced zImage and modules.gz per the basic instructions above and it works like a champ.