First you need to do some homework and read all you can about jets. There are a couple of great magazines out there - expensive, but very well worth it.

Check websites of the turbine manufacturers - you can get their names by reading this forum, then let your favorite search engine find them for you. About this time you need to decide what size turbine you want (or can afford).

When you have decided on a turbine, you can on a jet to mount it in. The biggest constraint is that it needs to be able to operate off the field you fly from - a fully decked out scale ship is not going to work on a 400' grass strip.

And finally, start saving your money...or maybe do that first.