The fuel tank is going to be a quest. My Sukhoi had a bulkhead that looked like it was cut for the tank that came in the box. And that bulkhead is inside another bulkhead, inside the nose. Unless you want to try cutting that sucker through the wing opening and fuselage bulkhead, you're going to be constrained by the dimension in there. I measured the "hole" in there, came up with some guesses as to what might fit, decided I wasn't going to try and get into that nose to trim the existing opening and looked around at the LHSs for anything else in that "range". And went with the supplied tank.