Or maybe built one yourself?
The ones that are built out of an old turbocharger, with the flametube basically in between the two turbofans. Same concept as a plane jet engine, but it is designed around the turbo.
I want to make one. How cheap can I get an old turbo that works effectively?
The nearest I got was when my husband was experimenting with hybrid fuel for our diesel. he kept exploding the hydrogen he was making. Fortunately the hydrogen escaped into the atmosphere so it never became really dangerous.