@eric, I didn't consider buying the sticks individually.  I was focused on buying them as a kit since general disclaimer over the years state that memory that come in kits usually come from the same factory.  At least that what I was told so I've not bought memory in individual sticks for years.  Also, you know what's funny, I never knew that there was an acronym for ECC UDIMMs.  *facepalm*  I've been doing my searches as "ECC Unbuffered DIMM".
Thanks Eric & TXAG26.  Looks like buying the stick individually from Amazon or eBay is the way to go.