Cheak this site out.
http://www.tridenthobbies.com/store/merchant.mv
On the front page they have what your looking for at a good price. Just be adviced that 1/72 is very large. I dont know were you live, But if your within driving distance from me i would be willing to build and paint it for you. You pay for the kit and all the paints. I have an airbrush set and all the tools needed.
Hey Kap tell me about that 688 you got i might be intrested. What scale and is it plastic or resin? And have you applied andy paint yet?