Hi, welcome to RCU. If I understand you properly you are asking where to get that particular TX , RX , and batery?

I can't get the link for some reason , but probably any 4 channel 2.4 system will work. It should include the TX and the RX at a minimum and can range from $20 to hundreds. The power batery will be purchased separately and most 3s x 2200 packs would work , but the dimensions and specs should be verified first.

I looked at the link and can't quite tell if it needs a 4 channel or 5 channel. Maybe a 6 channel should be bought just in case. Your post above indicates a 4 channel TX , and a 6 channel RX.