I think any heat protectant that contains a good amount of silicones will be your best option, which opens up, well, everything really. There are some CG heat protectants but I really think it's the silicone aspect of other products that give it that "protecting" quality.

I know Sally's has some GVP heat products that are inexpensive, so I'd start there.
CG Birthday: 7/25/11
Type 3a/2c
Dense, Fine in front Coarse in back, Low porosity
Low-Poo: SM Moisture Retention Shampoo
Rinse Out: Tresemme Naturals
Leave In: ^^^^
Stylers: AIF, Natural Silks Curly Gel
*Desert Curly*