both are from Fallout: New Vegas Dead Money
I only could find them on youtube since i don´t know how to extract them. they are not realy soundtracks but music playing in the background in certain locations
Fallout: New Vegas Dead Money Fountain Ambiance
I´m not sure about this one, since it also has vocals...
Fallout: New Vegas - Begin Again - Ambiance Version
but if you like twin peaks, you might like them