40th Birthday Party

Please assist me with the planning of my husband`s birthday party, I am planning a surprise party with the ideas of disco ball being centerpieces, I have tried to creat them myself but this is a very time consuming task I would like to find a rental store that carries them.But I would like your advise on others things to set up with (theme is MUSIC and Im incorporating some of the 70`s theme(not all), my husband will be 40 years of age. Thank you