Total posts : 45366
I noticed you joined today. Welcome!
I am sorry that I do not have a transmitter to donate. I just wanted to put you on to some information which you can consider.
The cost of a FM part15 transmitter is about the cost of a good microphone. You will find kits in the $100 range.
I don’t know your experience or expectations, but I advise that the range of these units, if operated legally, is very limited (hundreds of feet).
If you can, read other posts on this board. You will find a lot of information from folks who have been involved in part15 stations. I learned a lot just by looking around here.