I just saw your post. I just was at the Longmont Library today and they have an awesome obit reference and then the newspapers on reels....I found 9 obits today.
I am going to start a list of being needing obits and try to get back up to Longmont real soon. I am about 1/2 hour from there.
In the meantime...Mountain View Cemetery is the main cemetery..and the oldest. The lady there is extremely helpful and she can look up to see if your people are buried there. The phone # is 303-776-1036.
I have you on my list and hopefully in the next couple of weeks I can get back up to Longmont and let you know what I find....
Anna in Broomfield CO