I'm looking for 4 replacement single channel keyfobs for my obsolete auto
garage door opener. I have 1 remaining (working) transmitter. Anyone know
where I can get them and what I should be asking for? Inside the transmitter
is an 8 way switch and the receiver has 433 printed on the board.
Is it possible to buy keyfobs that will simply learn the frequency from the
transmitter I already have.

Thanks,

Simon