the colour of the glass and positioning and patterning of gilt banding would suggest that this set is possibly from the 1950's - 60's, and from the Czechoslovakian Borske Sklo factory - they produced masses of similar gilt decorated decanters, jugs, glasses etc. and this is typical of their wares.
Can't guarantee this provenance is accurate, but quite likely.
In view of the potential age I'd suggest very unlikely that you'll find a replacement for any of the pieces, and unfortunately it's impossible to value sentiment - these sets were inexpensive even when new.
just cherish the remainder, and don't move house again

P.S. welcome to the Glass Message Board.