This device is advertised for $1.69, free shipping. If you can find your lost cat with it I guess you can find your plane. The range is stated to be about 30 feet and can be operated with a smart phone with bluetooth. 30 feet may not be much but in the jungle out there, it can make a difference. If you want to save money, when you're done flying put it back on the cat.
https://www.banggood.com/Pet-Dog-Ant...r_warehouse=CN