Do a search and you should find several. In addition, if you like the RAT-7 or RTAK, you should do a search for the Ranger RD7 / RD9. They are semi-custom/production knives with similiar geometry. Evidently the maker bought some 700 Busse blanks and has been making these very well received knives for roughly the same $ as the RTAK/RAT-7. Their reviews have been very good.
Don't overlook the Beckers for hard-use, great quality, affordable knives. (Actually less $ than the RTAK.)
Either way, good luck and have fun!