Need help for Toy Remote Control Car Circuit

[Circuit Maker]

Hello everybody,
I want to make the following circuit but I can't find the RF Circuit. The typical application diagram needs a 27 Mhz crystal and I cant find it.
https://html.alldatasheet.com/html-pdf/154571/SILAN/TX-2B/1072/7/TX-2B.html

I looked at the following circuit too to slightly modify it for my purpose but it contains the 27 Mhz.
https://www.circuitstoday.com/5-channel-radio-remote-control

 

[Circuit Maker]

The IR circuit also works but it needs an IR Receiver circuit. Can somebody please give me one.
Also I would like to know why it needs 2 photo diodes.
https://html.alldatasheet.com/html-pdf/154571/SILAN/TX-2B/1226/8/TX-2B.html

 

[Audioguru]

Are those simple old Chinese remote control ICs still available?
I haven't seen a radio controlled product use 27MHz for about 30 years and all the infrared toy helicopters use more than one IR LED so the beam can be wider and more powerful.

 

[Circuit Maker]

I dont know whether they are available, I just found the circuit in the above site. But can you give the circuit diagram for an another remote control circuit with more available components.

 

[Audioguru]

Radio control transmitters and receivers are inexpensive and are available in hobby stores. Mine operate at 2.4GHz and the servos are proportional, not simply maximum movement then no movement.

 

[Circuit Maker]

The trouble is that they are hard to find in my country and has to be shipped so they become expensive. But I found some ICs on this site.
https://www.datasheetarchive.com/1--Remote+Control+Toy+Car+Receiver+IC-datasheet.html

Now I have to find some circuits for these ICs.