Model #4 in a "7" inch blade or shorter is available. I have not seen any 8" models. They have not been made at the Randall shop for 3 decades or better. Every time I say "they never made it" I find I'm seriously wrong. They haven't made it in a very long time. The ones I have ordered for customers and the ones I have seen for sale are all 7".
At any rate: A Model #4-6" or 7" can be ordered with the top bevel sharpened, double hilt, and whatever else you can conjure up. Remember...5 options is the limit. "TB" and "double hilt" would be 2 of those 5. Hope this helps Jimmy. Keep your head down...
Best, Capt. Chris